Space shuttle Endeavour reached space this morning after a flawless liftoff from NASA's Kennedy Space Center in Florida. The launch begins a chase by the shuttle to catch up to the International Space Station and deliver the newest module to the orbital complex, the Tranquility node. Endeavour's six astronauts are scheduled to spend the next 13 days in space flying the shuttle and working on the station. They will perform three spacewalks during that time to install Tranquility and the cupola with its seven windows and one-of-a-kind perspective on Earth.

This also wraps up the NASA Launch Blog for STS-130, but we'll be back in 13 days to follow the landing of Endeavour. Keep track of the mission at NASA's Web site. It will have videos and photos from the daily activities from the work in space, not to mention more coverage of today's spectacular launch.

See you for landing!

The external fuel tank has separated from Endeavour and the spacecraft is flying on its own now on its way to the International Space Station.

Endeavour shut down its three main engines on time after a flawless climb into orbit. Next up, jettisoning the external fuel tank that carried the propellants for the three main engines.

With all systems working well, Endeavour is flying at 6,000 mph and gaining speed. It is going too fast and has gone too far to return to KSC if there were an emergency. All systems go.

The fuel inside the solid rocket boosters are exhausted and the SRBs have separated from the stack, leaving Endeavour's three liquid-fueled main engines to power it the rest of the way into space.

Endeavour has rolled into its familiar position with the orbiter below the external tank for the climb into space. The orientation reduces aerodynamic loads on the shuttle during the ascent. The shuttle is quickly picking up speed and altitude as it speeds away from the Florida launch site. All systems working fine.

Endeavour has cleared the tower!

T-6 seconds and counting . . . Endeavour's three main engines are firing and building up pressure.

T-31 seconds and counting . . . Endeavour's five general purpose computers have taken over the countdown control from the ground-based launch processing system. Endeavour's GPCs are loaded with software that automatically moves through the last moments of the countdown.

T-2:30 and counting. . . The gaseous oxygen, abbreviated as "GOX," vent arm is swiveling away from Endeavour's external tank. The "beanie cap" at the end of the arm captures evaporating liquid oxygen during the countdown and funnels it away from the shuttle stack.

T-5 minutes and counting . . . The three auxiliary power units in Endeavour are up and running. They generate the hydraulic power needed to swivel Endeavour's three main engines during launch. The hydraulic system also moves the shuttle's aero surfaces, which are the rudder and elevons that steer the shuttle when it is in the atmosphere.

T-7 minutes and counting . . . The orbiter access arm is swinging away from the shuttle's hatch in preparation for launch. If an emergency develops, the arm can swing back into place within seconds and the astronauts can leave the shuttle.

T-9 minutes and counting . . . Endeavour is ready, the weather is “green” and the astronauts are eager to head into space. This is the final phase of today's run to launch and the launch pad and shuttle will make steady moves in the next nine minutes to set up for liftoff. The orbiter access arm will move out of the way shortly. The shuttle's auxiliary power units, which provide energy for Endeavour's hydraulic systems during launch, will activate at the T-5 minute point. Then the gaseous oxygen vent arm, which holds the "beanie cap," will move from the top of the tank.

"We'll see you in a couple weeks, it's time to go fly," Zamka radioed to Launch Director Mike Leinbach just before the countdown resumed.

Throughout the run up, the launch team keeps steady eyes on their instruments for any anomaly that could prompt a hold.

The three liquid-fueled main engines will fire to life six seconds before liftoff and build up pressure before the solid rocket boosters are lit at T-0.

"Wish you good luck and Godspeed," Launch Director Mike Leinbach radioed to Endeavour as the shuttle and its crew were cleared to launch this morning at 4:14 a.m.

You've heard how great those revolving restaurants atop skyscrapers are. Well, the space station doesn't offer a revolving restaurant, but it will offer astronauts a place to watch the Earth while it revolves beneath them. The great view is the courtesy of the cupola Endeavour is taking into space with the Tranquility node. The cupola is attached to end of the Tranquility node for launch, but will be moved to an Earth-facing port on Tranquility on the eighth day of the mission.

Since the cupola projects out from the station a bit, a crew member perched inside it will have a complete all-around view. It's kind of like standing up to look out of a sunroof at the city instead of just looking through the rolled-up passenger window. The cupola is completely pressurized, which means astronauts don't have to don spacesuits to work in it. In addition to its role as a premier lookout point, the cupola will be equipped with a robotics workstation for control of the station's main robotic arm and Dextre, a smaller robotic hand of sorts that works in concert with the arm. The windows are clear enough to be used for observation cameras. No word on plans to serve meals inside the cupola.

Endeavour Commander George Zamka has been told to select the emergency airfield in Zaragoza, Spain, as the primary transoceanic abort landing site in the unlikely event of an emergency early in launch. There are three sites in Spain and France to choose from and launch rules call for one of them to have acceptable weather conditions.

The weather at Kennedy remains "go" for launch.

Weather at Kennedy Space Center has improved and currently is go for launch and for a return to launch site abort, should that be necessary.

However, all three transoceanic abort landing sites are "no-go" for low cloud ceilings and rain showers within 20 nautical miles. The Spaceflight Meteorology Group at Johnson Space Center in Houston will continue to assess the TAL weather.

The Tranquility node tucked inside Endeavour’s cargo bay will be put to quick use after it is connected to the International Space Station. The cylindrical module has been outfitted to host experiments and equipment racks. The module is about 23 feet long and just under 15 feet in diameter. Inside Tranquility, an extensive network of cables and other fittings allows machinery to run effectively inside the station to help support six people living on orbit. Some of the machinery destined for Tranquility includes a water recycling system and a treadmill called "COLBERT," which was named for comedian Stephen Colbert.

And, just to reiterate, the weather conditions here at Kennedy are acceptable for launch. There is still concern for low clouds, but Shuttle Weather Officer Kathy Winters said the conditions "look promising" for Endeavour to take to space at 4:14 a.m.

Weather conditions have gone "green" or "go" for launch. Teams are not working any technical issues.

The countdown has begun its last built-in hold at the T-9 minute mark. The pause is planned to last about 45 minutes and set up Endeavour and the launch team for the last run through to launch at 4:14 a.m. Launch and flight control teams will conduct a series of polls during the hold to clear the shuttle for liftoff.

At NASA's Kennedy Space Center in Florida, space shuttle Discovery now is attached to its external fuel tank and twin solid rocket boosters atop the mobile launcher platform in the Vehicle Assembly Building.

Engineers are preparing the shuttle for its rollout to Launch Pad 39A, which is scheduled for March 2 at 12:01 a.m. EST.

The STS-131 astronauts are conducting a deorbit integrated simulation today at NASA's Johnson Space Center in Houston.

Discovery's crew will head to Kennedy early next month to participate in the Terminal Countdown Demonstration Test, or TCDT, and related prelaunch training.

Space shuttle Discovery will be attached to its external fuel tank and twin solid rocket boosters today in NASA Kennedy Space Center's Vehicle Assembly Building. The shuttle is being prepared for its rollout to Launch Pad 39A, scheduled for March 2 at 12:01 a.m. EST.

At NASA's Johnson Space Center in Houston, Discovery's STS-131 crew members will be reviewing administrative and Multi-Purpose Logistics Module, or MPLM, berthing and unberthing procedures today.

MPLMs are large pressurized modules flown in the shuttle's payload bay and attached to the International Space Station after docking. The MPLM can carry up to 16 large containers or racks of supplies, such as food, clothing, spare parts and research equipment. For this flight, the MPLMs will be filled with science racks that will be transferred to the station's laboratories.

Discovery's liftoff is targeted for April 5 at 6:27 a.m. EDT.

Monday morning, there were two space shuttle on the move at NASA's Kennedy Space Center in Florida.

Following Endeavour's post-landing return to its hangar in the Orbiter Processing Facility, space shuttle Discovery was moved from its hangar to the nearby Vehicle Assembly Building. The transfer paves the way for Discovery's roll to the launch pad on Mar. 2.

Discovery's astronauts were on hand for the move, having flown in from their home base at NASA's Johnson Space Center in Houston. The astronauts, who will fly Discovery on the STS-131 mission that is slated for April, were at Kennedy to inspect equipment they will use during their mission.

Following Sunday night's landing, Shuttle Launch Integration Manager Mike Moses said that space shuttle Endeavour's landing capped off a flawless mission. "The crew did an outstanding job," Moses said, referring to the complex task of installing Tranquility and its seven-windowed cupola to the International Space Station. "The landing today went as smooth as you can hope for -- by the numbers."

Shuttle Endeavour's STS-130 crew headed back to Houston Monday, where a welcome home ceremony was planned.

This morning, crews at NASA's Kennedy Space Center in Florida had two space shuttles on the move.

Following Endeavour's post-landing return to its hangar in the Orbiter Processing Facility, space shuttle Discovery was moved from its hangar to the nearby Vehicle Assembly Building. The transfer paves the way for Discovery's roll to the launch pad on Mar. 2.

Discovery's astronauts were on hand for the move, having flown in this morning from their home base at NASA's Johnson Space Center in Houston. The astronauts, who will fly Discovery on the STS-131 mission that is slated for April, will inspect equipment they will use during their mission.

Following last night's landing, Shuttle Launch Integration Manager Mike Moses said that space shuttle Endeavour's landing capped off a flawless mission. "The crew did an outstanding job," Moses said, referring to the complex task of installing Tranquility and its seven-windowed cupola to the International Space Station. "The landing today went as smooth as you can hope for -- by the numbers."

Shuttle Endeavour's STS-130 crew will head back to Houston today, where a welcome home ceremony will be held at 5 p.m. EST.

Just after space shuttle Endeavour made its way back to its Orbiter Processing Facility hangar, crews prepared to roll shuttle Discovery from the facility to the nearby Vehicle Assembly Building. The move, set for 10 a.m. EST this morning, paves the way for Discovery's roll to the launch pad on Mar. 2.

Discovery's astronauts are set to arrive at Kennedy this morning to inspect equipment they will use during their STS-131 mission.

Following last night's landing, Shuttle Launch Integration Manager Mike Moses said that space shuttle Endeavour's landing capped off a flawless mission. "The crew did an outstanding job," Moses said, referring to the complex task of installing Tranquility and its seven-windowed cupola to the International Space Station. "The landing today went as smooth as you can hope for -- by the numbers."

Moses wrapped up his remarks about the STS-130 mission by saying, "It was an outstanding mission -- I can't be happier with the success we had and look forward to repeating that on our next mission."

Shuttle Launch Director Mike Leinbach was extremely pleased with Endeavour's condition."One of the most magical things we get to do here at Kennedy Space Center is walk around the orbiter after a mission from space. She looks really, really good," Leinbach said. Leinbach also congratulated Norm Knight and his team in the Mission Control Center at NASA's Johnson Space Center in Houston for a job well done.

Shuttle Launch Integration Manager Mike Moses said that space shuttle Endeavour's landing capped off a flawless mission. "The crew did an outstanding job," Moses said, referring to the complex task of installing Tranquility and its seven-windowed cupola to the International Space Station. "The landing today went as smooth as you can hope for -- by the numbers."

Moses wrapped up his remarks about the STS-130 mission by saying, "It was an outstanding mission -- I can't be happier with the success we had and look forward to repeating that on our next mission."

Shuttle Launch Director Mike Leinbach was extremely pleased with Endeavour's condition."One of the most magical things we get to do here at Kennedy Space Center is walk around the orbiter after a mission from space. She looks really, really good," Leinbach said.

Leinbach also congratulated Norm Knight and his team in the Mission Control Center at NASA's Johnson Space Center in Houston for a job well done.

After a few words of thanks the STS-130 crew members are climbing into NASA's silver Astrovan for the short trip back to the crew quarters at Kennedy's Operations and Checkout Building. There they will undergo a thorough medical examination and greet their immediate family members.

There will be a post-landing briefing aired on NASA TV no earlier than 12 a.m. EST at www.nasa.gov/ntv.

The STS-130 astronauts are taking their last look at space shuttle Endeavour and in particular the heat shield that protected them through the re-entry of Earth's atmosphere.

The crew will be flown back to NASA's Johnson Space Center in Houston on Monday for a family reunion and a homecoming ceremony at nearby Ellington Field to celebrate the completion of the STS-130 mission.

All six crew members now are off Endeavour and inside the Crew Transport Vehicle. After a routine checkup, some of the astronauts will have a chance to take the traditional walk around the shuttle while it sits on the runway.

Before disembarking, Commander George Zamka thanked the entire NASA team for their efforts with the mission and getting him and his crew home safely.

The Crew Transport Vehicle was moved into position at Endeavour's hatch. The CTV contains beds and comfortable seats so that the astronauts can relax while they receive a brief medical checkup before stepping onto the tarmac.

Space shuttle Endeavour landed at Kennedy Space Center. A post-landing news conference with managers at Kennedy is expected no earlier than midnight ET on NASA TV and www.nasa.gov/ntv. The participants will be: Mike Moses, space shuttle launch integration manager, and Mike Leinbach, shuttle launch director.

A welcome ceremony for the crew's return to Houston will be held at Ellington Field's NASA Hangar 990 at 4 p.m. CT on Monday.

Space shuttle Endeavour fired its engines at 9:14 p.m. EST for the deorbit burn. The STS-130 crew is now headed home for a landing at Kennedy Space Center, Fla. at 10:20 p.m.

Weather ended up being much more stable than originally forecast, so Endeavour has been given the go to deorbit.

The burn is set for 9:14 p.m. EST with touchdown scheduled for 10:20 p.m.

Crew return to Houston currently is Monday with a 5 p.m. welcome ceremony at Ellington’s Hangar 990.

The crew of space shuttle Endeavour awoke at 2:14 p.m. EST to “The Marines' Hymn," played for Commander George Zamka (Col., USMC).

Weather permitting, Endeavour is scheduled to land at Kennedy Space Center's shuttle landing facility at 10:20 p.m. EST. The STS-130 entry team led by Flight Director Norm Knight will be on console in Mission Control at 3:30 p.m. to prepare for deorbit and landing.

The latest Kennedy forecast calls for a chance of showers within 30 nautical miles of the shuttle landing facility and a cloud ceiling at 6,000 feet, both violations of landing rules. The forecast for Edwards Air Force Base in California also contains violations for showers within 30 nautical miles of the runway and cloud ceilings at 3,000 and 6,000 feet. The National Weather Service Spaceflight Meteorology Group at Johnson Space Center will provide Knight and his team with continuous updated forecasts and real-time observations to aid in a "go-no go" decision for the deorbit burn.

STS-130 mission managers opted to forego a planned orbit adjust burn, changing space shuttle Endeavour's deorbit and landing times by a few minutes.

Weather permitting, Endeavour's deorbit burn will occur at 9:14 p.m. EST Sunday, leading to a landing at Kennedy Space Center at 10:20 p.m. There is a second Kennedy landing opportunity at 11:55 p.m. There also are two opportunities at Edwards Air Force Base in California early Monday at 1:25 a.m. and 3 a.m. Ground tracks for Endeavour's landing opportunities are posted on NASA's Web:

http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts130/news/landing.html

Forecasters are predicting a chance of showers within 30 nautical miles of Kennedy's shuttle landing facility and a cloud ceiling at 6,000 feet, both violations of landing flight rules. The forecast for Edwards also predicts violations for showers within 30 nautical miles of the runway and low cloud ceilings.

Earlier Saturday, Endeavour's astronauts completed the standard day-before-entry checkout of the shuttle's flight control systems and reaction control system jets.

At 9:49 p.m. EST, the six Endeavour astronauts are scheduled to talk about their flight in interviews with CNN, CNN Espanol, and Univision.

The interviews will air live on NASA TV.

The crew of space shuttle Endeavour awoke at 3:15 p.m. EST to the song “The Distance” by Cake, played for the entire crew.

The entry team of flight controllers will be on console in Mission Control at 4 p.m. to prepare for Sunday's targeted landing. They will assist the crew in its checkout of Endeavour's flight control surfaces and a test fire of its reaction control system jets.

At 4:30 p.m., NASA Television will air a news conference with Space Shuttle Program Mission Management Team Chairman LeRoy Cain.

While flying 208 miles above the Atlantic Ocean west of Mauritania and the western Sahara, space shuttle Endeavour undocked from the International Space Station at 7:54 p.m. EST, nine days, 19 hours and 48 minutes after docking on Feb. 10. Shuttle pilot Terry Virts performed a fly-around of the station, enabling his crewmates to conduct a photo survey of the complex. The station now is 98 percent complete by volume, 90 percent by mass.

Weather permitting, the deorbit burn is planned for 9:13 p.m. Sunday, leading to a landing at 10:16 p.m. at Kennedy Space Center's Shuttle Landing Facility.

The crew of space shuttle Endeavour awoke at 3:15 p.m. EST to the song “In Wonder” by Newsboys, played for Pilot Terry Virts.

The crews of the shuttle and International Space Station are making preparations for Endeavour to undock at 7:54 p.m. After initial spacecraft separation, Virts will take control of Endeavour’s stick for a fly around of the station. Later, the shuttle crew will unberth the orbiter boom sensor system for a “late inspection” scan of the shuttle’s heat shield.

The hatches between space shuttle Endeavour and the International Space Station were closed at 3:08 a.m. EST.

The combined crews of Endeavour and the International Space Station held a ribbon-cutting ceremony at 11:39 p.m. EST to dedicate Tranquility and the cupola. They are scheduled to close the hatches between the spacecraft at 2:34 a.m. Friday.

The crew of space shuttle Endeavour awoke at 3:44 p.m. EST to the song “I’m Gonna Be (500 Miles)” by Steven Curtis Chapman, played for Pilot Terry Virts.

The combined crews of Endeavour and the International Space Station will field questions from reporters during a Joint Crew News Conference at 9:39 p.m. At 11:39 p.m., they will hold a ribbon-cutting ceremony to dedicate Tranquility and the cupola before closing hatches between the spacecraft at 2:34 a.m. Friday.

President Obama, congressional leaders and middle school students spoke with the astronaut crews of the International Space Station and the Space Shuttle Endeavour at 5:14 p.m. EST Wednesday and congratulated them on their successful ongoing mission. The call took place from the Roosevelt Room of the White House.

Afterwards, crew members transferred and installed racks in the station’s new Tranquility node, reboosted the station using Endeavour’s thrusters, reconfigured spacesuits and passed the 75-percent mark of supply and equipment transfers between the two spacecraft.

President Obama, congressional leaders and middle school students spoke with the astronaut crews of the International Space Station and the Space Shuttle Endeavour at 5:14 p.m. EST Wednesday and congratulated them on their successful ongoing mission. The call took place from the Roosevelt Room of the White House.

A Mission Status Briefing will be broadcast on NASA TV at 5:30 a.m. Thursday.

At 9 p.m. EST, NASA Television will replay today’s phone call from President Obama to the STS-130 and Expedition 22 crews aboard the International Space Station.

The crew of space shuttle Endeavour awoke at 4:17 p.m. EST to the song “Oh Yeah” by Johnny A., played for Mission Specialist Stephen Robinson.

President Obama, congressional leaders and middle school students will speak with the combined crews of Endeavour and the International Space Station at 5:14 p.m. EST to congratulate them on their successful ongoing mission. The call will take place from the Roosevelt Room of the White House.

Spacewalkers Robert Behnken and Nicholas Patrick completed a 5-hour, 48-minute spacewalk at 3:03 a.m. EST. The pair finished all their scheduled tasks.

This was the last of three STS-130 spacewalks, the 233rd conducted by U.S. astronauts, the sixth for Behnken and the third for Patrick. It was the 140th in support of International Space Station assembly and maintenance, totaling 873 hours, 16 minutes.

Spacewalkers Nicholas Patrick and Robert Behnken have completed the third and final spacewalk of the STS-130 mission. The 5-hour, 48-minute spacewalk began Tuesday at 9:15 p.m. EST and ended Wednesday at 3:03 a.m.

At 12:25 a.m. EST, the crew opened the first window shutter of the cupola.

At this point into today’s spacewalk, Robert Behnken and Nicholas Patrick will come back together to route cables for the station’s video signal converter, or VSC. The VSC is used with power and data grapple fixtures, of PDGFs, which provide locations on the exterior of the station’s modules for the station’s robotic arm to attach to.

Behnken and Patrick will wrap up the last of the spacewalk activities for the mission with two final tasks. First, they will close off the centerline camera that was used on the zenith, or space-facing, port of the Harmony node when the pressurized mating adapter 3 was attached it. And finally, they will each remove six clamps and the flex hose rotary coupler on the port 1 segment of the station’s truss.

Mission Specialists Nicholas Patrick and Robert Behnken are conducting the mission’s third and final spacewalk.

The ammonia loops are open. With the cupola now located on its permanent home on Tranquility’s Earth facing port and the Pressurized Mating Adapter 3 on the end of the node, Patrick and Behnken are free to begin getting them into the right configuration. Patrick is connecting the mating adapter’s heater and data cables to Tranquility. Then he will work with Behnken to remove six panels of insulation over the cupola’s windows.

Once the insulation is out of the way, Patrick will be able release the three bolts on each of the seven window’s covers; those bolts held the covers in place during Endeavour’s launch. While he does so, Behnken will get back to outfitting Tranquility by installing four worksite interfaces and five more handrails.

Astronauts Robert Behnken and Nicholas Patrick switched their suits to battery power at 9:15 p.m. EST, signifying the start of the last of three STS-130 spacewalks. Behnken is wearing a spacesuit marked with solid red stripes. Patrick has on an all-white suit.

Tranquility outfitting will continue on this spacewalk. First, Behnken will open the second of the two ammonia loops he and Patrick routed during the previous spacewalk, and disconnect the temporary power cables Patrick set up during the first spacewalk.

Today’s spacewalk is expected to last about 6.5-hours.

The crew of space shuttle Endeavour awoke at 4:15 p.m. EST to the song “Window on the World” by Jimmy Buffett, played for Mission Specialist Kathryn Hire.

The mission’s third and final spacewalk is today. Spacewalkers Robert Behnken and Nicholas Patrick will complete the work on the Tranquility node and the cupola’s exterior, including removing covers and launch locks. Inside, Expedition 22 Flight Engineer Soichi Noguchi will move a robotics workstation, which has served as a backup inside the Destiny laboratory, into the cupola.

Mission Specialists Robert Behnken and Nicholas Patrick, set to perform the third spacewalk of the STS-130 mission, are spending the night in the Quest airlock of the International Space Station. The "campout" procedure, with the airlock pressure reduced to 10.2 psi, aims to lower their blood's nitrogen content and minimize the possibility of decompression sickness. The 6.5-hour spacewalk is scheduled to begin at 9:09 p.m. EST.

Pressurized Mating Adapter-3 was relocated to the end of the Tranquility node at 9:28 p.m. EST Monday.

The crew will have some off duty time before preparing for the third and final spacewalk of the mission that begins tonight at 9:09 p.m.

NASA Television will air a Mission Status Briefing today at 5:30 a.m. with STS-130 Lead Space Station Flight Director Bob Dempsey.

Using the station’s robotic arm, the crew has moved Pressurized Mating Adapter-3 from its previous location on the Harmony module to the open port on the end of the Tranquility node.

The crew of space shuttle Endeavour awoke at 4:15 p.m. EST to the song “Parabola” by Tool, played for Mission Specialist Robert Behnken.

The mission’s ninth day includes moving Pressurized Mating Adapter-3 (PMA 3) to the end of Tranquility to enhance micrometeoroid debris protection of the node, while cupola internal outfitting continues. The crew will have some off duty time later in the flight day.

The second stage capture of the cupola was at 1:31 a.m. EST, signifying the completion of the module’s relocation. It is securely latched and all Common Berthing Mechanism bolts have been driven in. The crew relocated the cupola from the Tranquility node’s forward side to Tranquility’s nadir (Earth-facing) port.

The crew has relocated the cupola at 1:25 a.m. EST from the Tranquility node’s forward side to Tranquility’s nadir (Earth-facing) port. The next stage was to deploy four latches to temporarily place it on the node. A series of 16 bolts then secured the cupola to its permanent location.

Using the space station’s robotic arm, Mission Specialists Terry Virts and Kathryn Hire have started maneuvering the cupola from Tranquility’s forward side to Tranquility’s nadir (Earth-facing) port. This will be the cupola’s permanent home on the station. The cupola relocation operation is expected to take about 1 hour, 45 minutes.

Pilot Terry Virts and Mission Specialist Kathryn Hire have latched onto the cupola with the station’s robotic arm. They will move the cupola to its permanent position on the Earth-facing side of the Tranquility node.

Mission Specialists Robert Behnken and Stephen Robinson will grapple Pressurized Mating Adapter-3 with the station’s robotic arm near the end of the day for its relocation on flight day 9.

At 10:24 p.m. EST, Pilot Terry Virts and Mission Specialist Kathryn Hire will take time to answer questions about their mission prepared by students at NASA Explorer Schools.

The event is scheduled to air live on NASA TV.

The crew of space shuttle Endeavour awoke at 4:14 p.m. EST to the song “Forty Years On,” the Harrow School in London song, played for Harrow alumnus Mission Specialist Nicholas Patrick.

After further analysis of the center disk cover interference issue, the teams determined that there wasn’t an issue with relocating the cupola. The crew will spend time today preparing the cupola for its relocation. Terry Virts and Kathryn Hire will latch onto the cupola with the station’s robotic arm. They then will move the cupola to its permanent position on the Earth-facing side of the Tranquility node and then open the hatch. Robert Behnken and Stephen Robinson will grapple Pressurized Mating Adapter-3 with the station’s robotic arm near the end of the day for its relocation on flight day 9.

Spacewalkers Robert Behnken and Nicholas Patrick completed a 5-hour, 54-minute spacewalk at 3:14 a.m. EST. The pair completed all their scheduled tasks.

This was the second of three STS-130 spacewalks, the 232nd conducted by U.S. astronauts, the fifth for Behnken and the second for Patrick. It was the 139th in support of International Space Station assembly and maintenance, totaling 867 hours, 28 minutes.

Inside the complex, the crew has completed the Tranquility node activation work.

Mission Specialists Nicholas Patrick and Robert Behnken have completed the second STS-130 spacewalk to outfit the Tranquility module at 3:14 a.m. EST Sunday.

Mission Specialists Robert Behnken and Nicholas Patrick have completed the task of connecting the ammonia loops. They now will spend the remaining time outfitting Tranquility. Behnken has installed insulation on the keel pin. He next will install four trunnions that connected Tranquility to the shuttle while it was in transit. He also will set up the centerline camera on the nadir, or Earth-facing, port of Tranquility and release the launch locks that held the petals of the port’s berthing mechanism in place during launch. The cupola will be moved to that port the following day.

Patrick will install a vent valve and eight handrails on Tranquility. The vent valve will be part of the atmospheric control and resupply system, and the handrails will be used by spacewalkers to move along the exterior of the node.

Behnken will wrap up his duties by removing tape on five gap spanners that act as a bridge for astronauts between areas on Tranquility without handrails.

The mission’s second spacewalk is proceeding well.

After Nicholas Patrick removed a quick disconnect cap, a small amount of ammonia crystals was observed. Based on conservative flight rules, Patrick’s suit is considered contaminated, although Patrick reported that he could not see any crystals on his suit.

If crystals are discerned, Patrick will try and wipe them off before reentering the airlock. As a precaution, the astronauts will spend additional time in the airlock to allow for any possible flakes to be cleansed from their suits through the airlock environmental system.

Inside the station, astronauts have completed the installation of the Advanced Resistive Exercise Device (ARED) in the Tranquility node.

At 9:20 p.m. EST, STS-130 spacewalkers Robert Behnken and Nicholas Patrick switched their suits to battery power, officially starting today’s excursion outside the orbiting laboratory. Behnken is wearing a spacesuit marked with solid red stripes. Patrick is wearing an all-white suit. This will be Behken’s fifth and Patrick’s second spacewalk.

Behnken and Patrick will spend their first four hours connecting the ammonia loops on the new Tranquility node to those of the Destiny laboratory. There are two loops, with two lines apiece, each of which must be connected to both Tranquility and Destiny and routed through a bracket on Unity, which connects Tranquility to Destiny. Behnken will open one of the loops so that ammonia will be allowed to flow to the node from the station’s external thermal control system.

Today’s spacewalk is expected to last about 6.5-hours.

The crew of space shuttle Endeavour awoke at 4:15 p.m. EST to the song “Too Much Stuff” by Delbert McClinton, played for Mission Specialist Stephen Robinson, who will be working as the intravehicular officer for today’s spacewalk.

NOTE: There is a change in today’s timeline. The cupola depressurization that was scheduled for 3:54 a.m. Sunday will not happen. Instead, that time will be used for center disk cover troubleshooting. Depress will be deferred to another day. Cupola grapple also has been removed from the timeline to allow for additional time for troubleshooting. Also, the Mission Management Team today officially approved to add an extra docked day to the mission. The first landing opportunity now would be on Sunday, Feb. 21.

Flight day seven will focus on configuring the new Tranquility module, inside and out, for its space operations. Spacewalkers Nicholas Patrick and Bob Behnken will continue external outfitting of Tranquility by connecting fluid jumpers and remaining avionics cables, and installing covers as well as hardware to assist with future spacewalks, such as handrails and gap spanners. Pilot Terry Virts, Mission Specialist Kathryn Hire, and Expedition 22 crew members Jeff Williams and Soichi Noguchi will work on configuring systems inside Tranquility.

ISS Commander Jeff Williams opened the hatch into Tranquility at 9:17 p.m. EST on Friday entering it for the first time with STS-130 Commander George Zamka and Mission Specialist Stephen Robinson. The hatch into the cupola was opened afterwards at 11:32 p.m.

ISS Commander Jeff Williams opened the hatch into Tranquility at 9:17 p.m. EST entering it for the first time with STS-130 Commander George Zamka and Mission Specialist Stephen Robinson. The hatch into the cupola is scheduled to be opened afterwards.

The crew of space shuttle Endeavour awoke at 4:14 p.m. EST to the song “The Ballad of Serenity,” performed by Sonny Rhodes. The song, which is the theme song of the TV series “Firefly” was played for Mission Specialist Bob Behnken.

Spacewalkers Bob Behnken and Nicholas Patrick completed a 6-hour, 32-minute spacewalk at 3:49 a.m. EST.

The spacewalking pair finished all their assigned work and some get-ahead tasks. The Tranquility node and cupola were robotically maneuvered from Endeavour’s payload bay then installed onto the port side of the Unity node. Tranquility’s hatch is scheduled to be opened at about 9:14 p.m. tonight.

This was the first of three STS-130 spacewalks, the 231st conducted by U.S. astronauts, the fourth for Behnken and the first for Patrick. It was the 138th in support of International Space Station assembly and maintenance, totaling 861 hours, 34 minutes. It was the 110th spacewalk out of the space station, totaling 674 hours, 19 minutes.

After going back to the airlock to retrieve insulation and jumpers to be stored for use in a later spacewalk, both Bob Behnken and Nicholas Patrick now will come together at the special purpose dexterous manipulator, or Dextre, to remove its orbital replacement unit temporary platform, a storage platform that allows the robot to carry spare parts. They will retrieve two handles from storage and install them on the robot and the platform, then work together to release the four fasteners connecting the platform to the robot. Behnken will carry the platform to a stowage bin on the left side of the station’s truss, where it will be available for use as a backup to a new enhanced platform that will be installed on Dextre during the STS-132 mission.

While that work is going on, Terry Virts and Kay Hire have unloaded Tranquility from Endeavour’s cargo bay and are installing it on the Unity node. Once installed, Behnken and Patrick will begin hooking it up. Patrick will begin by connecting Tranquility’s heater cables to Unity to provide a temporary power supply. Behnken, meanwhile, will connect eight avionics cables between the nodes.

Astronauts Bob Behnken and Nicholas Patrick switched their suits to battery power at 9:17 p.m. EST, signifying the start of the first of three STS-130 spacewalks. Behnken, the lead spacewalker for the mission, will wear a spacesuit marked with solid red stripes. This will be his fourth spacewalk – his first three, during the STS-123 mission in 2008, totaled 19 hours and 19 minutes. Patrick, a first-time spacewalker, will wear an all-white suit.

Mission Specialist Steve Robinson will work inside the space station as the intravehicular officer, or spacewalk choreographer. Pilot Terry Virts and Mission Specialist Kay Hire will be working the robotic arm’s controls.

The first order of business will be the preparation of the new Tranquility node for installation on the Unity node. Behnken will begin by moving to Unity and opening a flap that will expose Unity’s centerline camera, which will be used to line up the two nodes during installation. He will then remove eight contamination covers from the port on Tranquility that will be docked to Unity. While Behnken is doing so, Patrick will begin by installing an electric circuit on the avionics panel of Tranquility and removing cables that provide the node power from the shuttle before its installation.

Today’s spacewalk is expected to last about 6.5-hours.

The crew of space shuttle Endeavour awoke at 4:14 p.m. EST to the song “Beautiful Day” by U2, played for Mission Specialist for Kay Hire.

The fifth day of the mission will focus on the first spacewalk and robotics work to install the Tranquility node. The spacewalk is expected to begin at around 9:09 p.m., although could begin a little earlier if the crew is ready.

Spacewalkers Nicholas Patrick and Bob Behnken will prepare Tranquility for its removal from Endeavour’s payload bay and then install avionics cabling once the new module is in place. Terry Virts and Hire will operate the station’s robotic arm to install Tranquility with the Cupola. The spacewalkers also will remove a tool platform from the station’s special purpose dexterous manipulator, or DEXTRE, while Tranquility is being maneuvered. Station Commander Jeff Williams and Hire will begin a leak check of the interface to Tranquility.

Spacewalkers Nicholas Patrick and Robert Behnken began their overnight campout in the station's Quest airlock a little before 8 a.m. EST in preparation for the first of three spacewalks during space shuttle Endeavour's visit to the orbiting laboratory. They are sleeping in the reduced 10.2 psi pressure of the airlock to avoid decompression sickness, or the bends.

The STS-130 and Expedition 22 crew members enjoyed some off duty time for the latter portion of their day before a spacewalk procedures review that began at 4:09 a.m. EST Thursday.

The STS-130 and Expedition 22 crew members are scheduled for some off duty time for the latter portion of their day before a spacewalk procedures review at 4:09 a.m. EST Thursday.

At 11:49 p.m. EST, members of the STS-130 and Expedition 22 crews are scheduled to discuss the mission in interviews with KXTV-TV in Sacramento, Calif., WKRG-TV in Mobile, Ala. and KMOX Radio in St. Louis, Mo.

The interviews are scheduled to air live on NASA TV.

The crew of space shuttle Endeavour awoke at 4:19 p.m. EST to the song “Also Sprach Zarathustra” by Richard Strauss, played for Mission Specialist Nicholas Patrick, who fondly remembers the music from the 1968 film 2001: A Space Odyssey.

After wake up, the crew was notified that a focused inspection will not be necessary.

Today Endeavour’s crew will begin transferring supplies from the shuttle’s middeck to the space station, including spacewalking equipment, and then will have the afternoon off. Tonight, spacewalkers Bob Behnken and Patrick will sleep in the Quest airlock as part of the overnight “campout” procedure that helps purge nitrogen from their bloodstreams, preventing decompression sickness once they move out into the vacuum of space. The campout will be repeated the night before each spacewalk.

Space shuttle Endeavour's crew will awaken at 4:14 p.m. EST. Wednesday's work will focus on supply transfers, spacewalk preparations and Water Recovery System repairs. Thursday's work will focus on installation of the new Tranquility module onto the Unity module and the mission's first spacewalk.

Hatches between space shuttle Endeavour and the International Space Station were opened at 2:16 a.m. EST.

Correction from previous update: At docking, the shuttle and station were 215 miles up and over the Atlantic west of Portugal.

At 12:06 a.m. EST, Commander George Zamka backed space shuttle Endeavour into pressurized mating adapter #2 on the International Space Station’s Harmony node. The two spacecraft were flying 225 miles up & off the northern coast of Spain at the time they docked.

The shuttle and station crews will open hatches and hold the traditional welcome ceremony at 2:04 a.m. Endeavour’s crew will be working with Expedition 22 commander NASA astronaut Jeff Williams and flight engineers cosmonaut Max Suraev, NASA astronaut T.J. Creamer and Japan Aerospace Exploration Agency astronaut Soichi Noguchi.

Less than an hour after hatches are open, Mission Specialist Nicholas Patrick and Creamer will operate the station’s robotic arm to remove the Orbiter Boom Sensor System (OBSS) from Endeavour’s payload bay and hand it off to the shuttle robotic arm being operated by Terry Virts and Kay Hire.

Today’s Mission Status Briefing is set for 3:30 a.m. and will air live on NASA TV.

Space shuttle Endeavour has completed the nine-minute R-Bar pitch maneuver, also known as the Rendezvous Pitch Maneuver.

At 11 p.m. EST, space shuttle Endeavour began the nine-minute R-Bar pitch maneuver, also known as the Rendezvous Pitch Maneuver, or “backflip.” With Commander George Zamka at the controls, Endeavour is rotating backwards to enable space station astronauts Jeff Williams and Oleg Kotov to take high resolution pictures of the shuttle’s heat shield.

Docking is scheduled for 12:06 a.m.

Commander George Zamka and the crew of Endeavour performed the Terminal Initiation burn at 9:28 p.m. EST, firing the left Orbital Maneuvering System engine for nine seconds to place the shuttle on the final path for its 12:06 a.m. docking to the International Space Station. When Endeavour is about 600 feet from the station, Zamka will maneuver Endeavour through a backflip rotation to expose the heat shield to station crew members Jeff Williams and Oleg Kotov, who will use digital cameras with 800mm and 400mm lenses, respectively, to photograph Endeavour’s upper and bottom surfaces through windows of the Zvezda service module. The photos will be transmitted to Mission Control for evaluation by imagery experts and mission managers to determine whether the heat shield sustained any damaged during launch.

The crew of space shuttle Endeavour awoke at 5:14 p.m. EST to the song “Katmandu” by Bob Seger, played for shuttle Commander George Zamka.

Today is docking day in space, as shuttle Endeavour closes the gap to the International Space Station and links up at about 12:06 a.m. Endeavour will be flown by Zamka and Pilot Terry Virts on its approach for docking to the station. After a series of jet firings to fine-tune Endeavour’s path to the complex, the shuttle will arrive at a point about 600 feet directly below the station about an hour before docking. At that time, Zamka will execute the rendezvous pitch maneuver, a one-degree-per-second rotational “backflip” to enable station crew members to snap hundreds of detailed photos of the shuttle’s heat shield and other areas of potential interest – another data point for imagery analysts to pore over in determining the health of the shuttle’s thermal protection system.

Once the rotation is completed, Zamka will fly Endeavour in front of the station before slowly closing in for a linkup to the forward docking port on the Harmony module. Less than two hours later, hatches will be opened between the two spacecraft and a combined crew of 11 will begin eight days of work.

The STS-130 crew spent its first full day in space inspecting space shuttle Endeavour’s thermal protection system, checking out spacesuits and making preparations for docking with the International Space Station. The crew is scheduled to wake up at 5:14 p.m. and begin rendezvous operations to dock with the station shortly after midnight Wednesday.

The STS-130 astronauts are scheduled to begin their sleep period at 9:14 a.m. EST, following a busy day devoted to an inspection of space shuttle Endeavour’s thermal protection system, a checkout of spacesuits and preparations for docking with the International Space Station. The crew is scheduled to wake up at 5:14 p.m. and begin rendezvous operations to dock with the station shortly after midnight Wednesday.

The survey of the shuttle’s heat shield has been completed. The photos of the heat shield captured during the inspection, as well as others taken during various points in the mission, will be used to ensure that the shuttle did not sustain any damage during its launch on Monday.

The STS-130 crew is using Endeavour’s robotic arm, orbiter boom extension and specialized cameras to capture detailed video of the spacecraft’s heat shield. The inspection gives experts on the ground 3-D views of the shuttle’s heat shield to ensure no damage occurred during liftoff.

The crew of space shuttle Endeavour awoke at 6:15 p.m. EST to the song “Give Me Your Eyes” by Brandon Heath, played for Terry Virts in honor of his first spaceflight.

Today, astronauts will focus on using the robotic arm and its Orbital Boom Sensor System extension to check the reinforced thermal protection on the leading edges of Endeavour’s wings and nose cap for any damage that may have occurred on launch.

The crew also will prepare for rendezvous and docking and check out the spacesuits Mission Specialists Nicholas Patrick and Robert Behnken will wear for three spacewalks, devoted largely to installation of Tranquility and the outfitting of the new module, the cupola and a docking port that will be relocated during docked operations.

Space shuttle Endeavour’s crew was awakened at 6:14 p.m. EST for a work day that will focus on using the robotic arm and its Orbital Boom Sensor System extension to check the reinforced thermal protection on the leading edges of Endeavour’s wings and nose cap for any damage that may have occurred on launch. The crew also will prepare for rendezvous and docking and check out the spacesuits Mission Specialists Nicholas Patrick and Robert Behnken will wear for three spacewalks, devoted largely to installation of Tranquility and the outfitting of the new module, the cupola and a docking port that will be relocated during docked operations.

"What a beautiful launch we had this morning... the orbiter performed extremely well," said Bill Gerstenmaier, associate administrator for Space Operations, during the STS-130 postlaunch news conference. "This is a great start to a very complicated mission."

Jean-Jacques Dordain, European Space Agency director general, thanked NASA, the crew and the ground teams for "a very beautiful launch." Dordain said, "It was an important event. Even more important for us because the shuttle was full of European hardware."

Mike Moses, shuttle launch integration manager, said the count went unbelievably smooth. He commented how the weather constraints influenced the launch of space shuttle Endeavour and how happy he was that it all came together today. Docking is set for flight day three with three spacewalks planned to install the Tranquility node and then cupola permanently to the International Space Station. "This will be a good example of international partnerships and cooperation between the station crew and shuttle crew," said Moses.

"This was one of the smoothest countdowns ever," said Mike Leinbach, shuttle launch director. "The team was very, very energized going into the count."

About two minutes into flight, the external fuel tank and solid rocket boosters propelling Endeavour into space successfully separated and fell away. The shuttle and its crew have safely attained low-Earth orbit.

NASA Television will broadcast a post-launch news conference from Kennedy Space Center in Florida at no earlier than 5:30 a.m. EST on www.nasa.gov/ntv.

Space shuttle Endeavour and its six astronauts are rocketing toward orbit after a brilliant nighttime liftoff from NASA's Kennedy Space Center in Florida.

The last minutes of Endeavour's countdown to launch is marked by several steps, including the retraction of the orbiter access arm and the gaseous oxygen vent arm, which holds the "beanie cap" over the external tank.

The ground launch sequencer manages the countdown during the last nine minutes and monitors the shuttle's systems until the final moments before launch. At the 31-second mark, Endeavour's onboard computers will take control and ignite the solid rocket boosters and orbiter main engines.

Space shuttle Endeavour has been cleared for launch this morning at 4:14 a.m. EST.

The mission management team, mission control and the launch team have given a unanimous "go" for launch.

The teams are not working any technical issues and the weather has cooperated over Launch Pad 39A at NASA's Kennedy Space Center in Florida.

At NASA's Kennedy Space Center in Florida, space shuttle Endeavour and crew are nearing liftoff at Launch Pad 39A, prepared to begin the STS-130 mission to the International Space Station.

The countdown clock is holding at T-9 minutes. This is the last built-in hold and is scheduled to last about 45 minutes. During this hold the mission management team will conduct its final "go," or "no-go" decision for launch.

Weather at Kennedy Space Center has improved and currently is "go" for launch and for a return to the Shuttle Landing Facility, if necessary.

Weather over Spain, one of the three Transoceanic Abort Landing, or TAL, sites has cleared and given a "go" by the Spaceflight Meteorology Group at Johnson Space Center in Houston.

Space shuttle Endeavour's countdown has resumed at T-20 minutes and counting.

There will be a planned hold at T-9 minutes that will extend about 45 minutes. During this hold the mission management team will conduct its final "go," or "no-go" decision for launch.

The launch weather remains "no-go" because of low cloud ceilings, but forecasters are hopeful there will be a gap in the clouds around launch time.

At 2:59 a.m. EST the countdown entered a 10-minute built-in hold.

Weather is still a primary concern with a 60 percent chance for favorable conditions at launch time.

Astronaut Chris Ferguson will take to the skies in the Shuttle Training Aircraft and report his observations to mission control.

The White Room crew has closed the hatch and will pressurize the crew cabin, check for leaks then finish remaining tasks before departing the pad.

Meanwhile inside the Endeavour, the shuttle's six astronauts are running through prelaunch tests and checks.

All systems are "go," with no technical issues being reported although cloud cover over the launch pad has changed the forecast from "go" to "no-go" at this time. Weather officers are cautiously optimistic that the clouds will move out of the area in time for launch at 4:14 a.m. EST.

NASA's Freedom Star and Liberty Star booster recovery ships are in position. Both currently are stationed about 160 miles off the Florida coast.

The ships are waiting to tow the solid rocket boosters back to Kennedy Space Center after their descent into the ocean.

The countdown remains on track for a 4:14 a.m. EST liftoff and the forecast still calls for a 60 percent favorable outlook for launch with no technical issues being reported.

Commander George Zamka is first to board and be seating inside Endeavour. First-time flier, Pilot Terry Virts, Mission Specialists Kathryn Hire, Stephen Robinson, Nicholas Patrick and Robert Behnken are next to be strapped securely in their seats.

Communication checks are being conducted between the astronauts, the Mission Control Center in Houston and the Launch Control Center at Kennedy, as each takes their seat.

When all the crew members are seated, the Closeout Crew will close the hatch, pressurize the crew cabin and check for leaks, then finish remaining work inside the pad's White Room before departing.

Astronaut Chris Ferguson is flying weather reconnaissance in the Shuttle Training Aircraft keeping mission control informed of current conditions at Kennedy Space Center.

The crew of space shuttle Endeavour's STS-130 mission is at the launch pad and took a quick elevator ride to the 195-foot level where NASA's Closeout Crew waits for them in the White Room.

Last-minute adjustments will be made to the astronauts' flight suits and an orange glow stick tucked into the pocket of each suit for safety by the Closeout Crew before they climb into the shuttle.

No technical issues are being reported and the forecast is still cooperating with only a 40 percent chance that weather will hamper an on-time liftoff at 4:14 a.m. EST.

The STS-130 astronauts are striding out of the Operations and Checkout Building to the cheers and applause from the crowd of well-wishers as they head for NASA's silver Astrovan, the vehicle that will take them to the launch pad.

While the crew heads to the pad, a group of technicians known as the "Closeout Crew" is already inside Endeavour's crew compartment getting the vehicle ready for their arrival. They will conduct the final check of the astronaut's flight gear, help them climb aboard the shuttle and then secure them in their seats.

The launch forecast is currently "green" or "go" with a 60 percent probability of favorable weather for liftoff at 4:14 a.m. EST. No technical issues are being reported.

Just before midnight the six STS-130 crew members will be climbing into their flight suits, helmets and gloves at Kennedy's Operations and Checkout Building.

The flight suits contain an oxygen supply, communications equipment and a temperature control system that offer protection in the event of an emergency and pressure changes during liftoff.

The crew also will be attending a briefing with flight controllers to discuss details on weather conditions at Kennedy's Shuttle Landing Facility and the transoceanic abort landing, or TAL, sites.

Check out www.nasa.gov/ntv for live launch coverage of Endeavour's STS-130 mission to the International Space Station.

You also can follow Endeavour's exciting countdown to launch with NASA's Launch Blog from inside Kennedy's Firing Room 3 and continuing through main engine cutoff -- when Endeavour reaches orbit on its two-day race to the station.

The Closeout Crew and Final Inspection Team are at Launch Pad 39A in preparation for liftoff tomorrow morning.

The Final Inspection Team also known as the "Ice Team" will spend about two hours checking the outside of the shuttle, solid rocket boosters and external tank for large chunks of ice or other debris on or near the shuttle.

The Closeout Crew is preparing the White Room for the arrival of the astronauts.

With filling of space shuttle Endeavour's external fuel tank completed, the Final Inspection Team and Closeout Crew are preparing to enter the launch pad area. At 9:49 p.m. EST, the countdown reached a built-in hold at the T-3 hour mark, and the hold will last for two and a half hours. Weather is currently "green" but there still remains a 40 percent chance of "no go" at the time of liftoff.

Weather is now "green" but there still remains a 40 percent change of "no go" at the 4:14 a.m. EST launch time. Conditions are expected to toggle back and forth throughout the countdown. Tanking operations are nearing a close, with about 20 minutes to go. Filling of space shuttle Endeavour's external fuel tank began at 6:50 p.m. EST.

Shuttle Weather Officer Kathy Winters briefed Shuttle Launch Director Mike Leinbach and Final Inspection Team Director Tom Ford on weather conditions for launch. We currently are "red" or “no go” for launch due to the low cloud ceiling. The weather team is seeing more breaks in the clouds as they make landfall. The temperature at Launch Pad 39A currently sits at 50 degrees and is expected to drop another degree or two before launch. Earlier tonight, mission managers gave the “go” for filling space shuttle Endeavour's external fuel tank, which began at 6:50 p.m. EST. The process should take approximately three hours.

Mission managers gave the “go” for filling space shuttle Endeavour's external fuel tank, which began at 6:50 p.m. EST. The process should take approximately three hours. There is a 60 percent chance of favorable weather at tomorrow's launch time of 4:14 a.m. EST.

Managers officially have scheduled space shuttle Endeavour's next launch attempt for Monday, Feb. 8 at 4:14 a.m. EST.

The Mission Management Team will meet at 6:15 p.m. Sunday to give the "go" to fill Endeavour's external fuel tank with propellants. Tank loading would begin at 6:45 p.m.

Space shuttle Endeavour's launch attempt has been scrubbed due to a low cloud ceiling over Kennedy Space Center.

Managers initially plan for a 24-hour turnaround, but will evaluate tomorrow's weather before making a final decision. Next possible launch attempt is Monday, Feb. 8 at 4:14 a.m. EST.

Forecasters describe the weather as dynamic with low-ceiling clouds moving in over Kennedy Space Center changing the "go" for launch to "red" or "no-go," once again.

Astronaut Chris Ferguson continues to fly weather reconnaissance reporting his findings to Shuttle Weather Officer Kathy Winters.

We currently are "go" for weather. Launch managers are cautiously optimistic and they will look closely at expected weather conditions at launch time before deciding whether to go ahead with the countdown.

The countdown has entered a 45-minute hold at T-9 minutes. During the hold, a series of polls will be conducted to verify the readiness of managers and engineers at Kennedy Space Center and Mission Control in Houston to proceed with launch. Liftoff still is targeted for 4:39:50 a.m. EST.

We currently are "no-go" due to a low cloud ceiling. Astronaut Chris Ferguson continues to fly weather reconnaissance in a Shuttle Training Aircraft to evaluate the situation.

The countdown to launch continues toward a 4:39 a.m. EST liftoff, but a cloud ceiling has moved over Kennedy Space Center and the launch forecast is "red," or "no-go," at this time.

Weather reconnaissance flights continue to monitor the cloud banks and a possible break in the cloud ceiling is possible at launch time.

Space shuttle Endeavour's countdown has resumed at T-20 minutes and counting. There will be a planned hold at T-9 minutes that will extend about 45 minutes.

The hatch on space shuttle Endeavour has been closed and latched for flight. The countdown is proceeding as planned but weather remains a concern around the launch site at NASA's Kennedy Space Center in Florida, with clouds moving in from the north.

NASA's recovery ships, Liberty Star and Freedom Star are stationed in the Atlantic Ocean, ready to capture the solid rocket boosters after they splash down and return them to Kennedy Space Center for refurbishing.