Astronauts Reid Wiseman and Barry "Butch" Wilmore floated outside the International Space Station Wednesday and, after a bit of trouble with a balky bolt, replaced a broken voltage regulator in one of eight solar power channels to restore the lab's electrical grid to normal operation.

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The airlock has been repressurized and Wiseman and Wilmore are back inside the space station.

With the end of today's spacewalk, Butch Wilmore has accumulated 6 hours, 34 minutes, of EVA time. Reid Wiseman now has logged 12 hours, 47 minutes, on two spacewalks.

Today's spacewalk was the 183rd EVA in support of space station assembly and maintenance since December 1998.

Repressurization of the Quest airlock began at 1850 GMT (2:50 p.m. EDT) to mark the end of today's spacewalk. The official duration of the EVA was 6 hours, 34 minutes.

Wiseman and Wilmore have returned to the airlock and are preparing to close the hatch. The official end of today's spacewalk will come with the start of repressurization of the airlock.

With the new camera installed and all their tasks complete, Wiseman and Wilmore will start gathering their tools and equipment and head back to the Quest airlock to end today's spacewalk.

As the spacewalkers work on the new camera, mission control confirms the wireless antenna installed earlier is functioning normally after power-up and testing.

Butch Wilmore has finished up work at the wireless antenna work site on the Harmony module after cinching power cables. Mission control has directed Wilmore to join Wiseman on the port-side truss to assist him in installing a new camera there.

Reid Wiseman moving along the space station's truss with a new camera group on the way to connect it at a camera port on the port side of the complex.

Wilmore has attached the wireless antenna to the stanchion on Node 2, and he will now connect power cables to the antenna.

Wiseman has picked up the broken camera removed from the port-side truss earlier in the spacewalk and returned it to the Quest airlock. He will retrieve a spare camera group from the airlock for installation on the operating port where the wireless antenna had been installed before it was moved by Wiseman earlier.

After struggling more than a half-hour to install the camera post, Wiseman and Wilmore have bolted the stanchion into place on the Harmony module. Next up is attachment of the wireless video system external transceiver assembly, an antenna that will relay helmet camera views during future spacewalks.

Carrying a wireless TV antenna, Wiseman has arrived at the Node 2 space-facing installation point for the camera stanchion. He will assist Wilmore in firmly bolting the stanchion to the module after some initial trouble attaching it.

Now at the four-hour mark in today's EVA.

Wilmore is heading to the space-facing side of the Node 2, or Harmony, module with the camera stanchion just removed from the truss. Wiseman will retrieve a wireless TV antenna from the truss and rendezvous with Wilmore on Node 2 to connect it with the stanchion there.

The astronauts report they feel good and want to continue with today's spacewalk. Mission control says the spacewalkers are working about 20 minutes ahead of schedule.

Having disconnected the balky camera, the astronauts are about to unlatch a camera stanchion from the space station's port-side P1 truss and move it to a new attachment point on the Harmony module.

Now passing three hours into today's spacewalk.

The spacewalkers will next remove a camera system from the nadir side of the port-side P1 truss. The camera, which has lost its zoom capability, will be returned inside the space station. A mounting platform used by the camera will be transferred to the Harmony module.

This activity also helps clear the way for plans to move the Permanent Multipurpose Module to the space station's Node 3, or Tranquility, module next year.

Wiseman and Wilmore have relocated a portable foot restraint and tool stanchion from the space station's port-side P1 truss segment to the central S0 truss. This task helps clear the way for the relocation of the space station's Permanent Multipurpose Module next year.

Mission control reports the replacement SSU is in good shape after the spacewalkers installed the fresh unit with less than 2 minutes to spare on the space station's night pass.

"Woohoo," the astronauts exclaimed when hearing the new SSU was healthy.

With the completion of the spacewalk's primary task, Wilmore will take the failed SSU back to the airlock as Wiseman prepares to relocate an articulating portable foot restraint and tool stanchion.

The replacement SSU is now locked in place on the space station's starboard power truss after Wiseman used manual racket wrench to help drive the bolt.

Wiseman has run into some trouble driving the bolt to connect the replacement SSU.

The replacement sequential shunt unit is in position on the truss, and Wiseman is trying to drive the bolt to connect the device into its holding slot.

Wilmore will hand off the spare sequential shunt unit to Wiseman for installation in the next few minutes.

The racket wrench helped, and Wiseman has broken torque and unlocked the bolt. Wiseman will now remove the failed SSU from its slot on the truss.

Wiseman has been unable to break torque on the single bolt holding the SSU to the truss.

"The PGT (pistol grip tool) doesn't have enough power to turn it right now," Wiseman said. "I can feel it binding up."

Mission control has instructed Wiseman to use a manual ratchet wrench instead.

Mission control has given Wiseman the "go" to begin removing the sequential shunt unit.

Now passing over Central Asia, the International Space Station is a few minutes away from orbital sunset. The 35-minute clock to remove and replace the sequential shunt unit starts 2 minutes after night begins.

Wiseman has broken torque on the bolt holding the failed sequential shunt unit to the space station's starboard truss. The spacewalkers will wait until orbital night to attempt removal of the SSU.

Wiseman and Wilmore are moving along the space station's truss backbone toward the right-side Starboard 4 truss segment, where they will remove and replace a sequential shunt unit, or SSU, that failed in May.

The SSU helps regulate electricity generated by one set of the space station's huge U.S.-made solar arrays before it enters the outpost's power system, shunting electricity or allowing power loads to reach the lab's internal electrical network based on needs.

The failure of the SSU on power channel 3A forced engineers to route electricity from other channels to power critical space station systems.

The spacewalkers must wait for a night pass to conduct their work on the SSU because the solar arrays generate power when the space station is sunlight. Working at night reduces the risk of arcing or a power discharge while the astronauts replace the SSU.

With the Quest airlock now depressurized, the astronauts switched their spacesuits to battery power at 1216 GMT (8:16 a.m. EDT) to mark the official start of today's planned six-and-a-half hour spacewalk.

Wiseman's suit can be distinguished by red stripes around the legs. Wilmore's suit is all white.

Both astronauts are also wearing helmet cameras, with Wiseman's having the No. 17 in the lower right corner of the view and Wilmore's camera designated No. 18.

This is Wiseman's second spacewalk after a 6-hour, 13-minute excursion Oct. 7 with astronaut Alexander Gerst. This is Wilmore's first EVA of his career.

Astronauts Reid Wiseman and Butch Wilmore are in the final stages of preparations for a spacewalk Wednesday to replace a broken voltage regulator on the space station's power system, relocate hardware, and install a new camera suite outside the massive research complex.

Wiseman and Wilmore have put on their spacesuits inside the space station's Quest airlock, which is now being depressurized before the official start of the spacewalk, which occurs when the astronauts switch their suits to internal battery power.

Working outside the International Space Station, NASA astronaut Reid Wiseman and European Space Agency crewmate Alexander Gerst successfully moved a failed ammonia pump module to an external stowage platform Tuesday, completing a task originally planned for a repair spacewalk last December.

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Today's spacewalk officially ended at 1843 GMT (2:43 p.m. EDT) with the beginning of repressurization of the Quest airlock. The EVA's official time was 6 hours, 13 minutes.

Mission control now says they will not send the spacewalkers after the two tool bags, so Wiseman and Gerst are heading back toward the airlock to wrap up today's spacewalk.

With the spacewalkers finishing their objectives ahead of schedule, mission control is sending Wiseman and Gerst on two get-ahead tasks. They will retrieve two tool bags outside the space station left behind on previous EVAs.

The spacewalkers have finished setting up the mobile transporter relay assembly, installing a box and routing cables around the robotic rail car. They will now ensure the cables are safely out of the path of the transporter.

Wiseman and Gerst, now off the robot arm, are working right on schedule. Both spacewalkers are now on the space station's mobile transporter to set up the power relay assembly and run cables.

Gerst has replaced the light and unlocked the light stanchion's pan and tilt mechanism, completing the second major task of today's spacewalk.

Wiseman has returned to the airlock to stow a bag, then he will move to the space station's truss backbone to begin installation of the mobile transporter relay assembly.

The relay assembly consists of a box and two cable sets that would serve as a backup power supply for equipment on the mobile transporter, which serves as a rail car to move the space station's robotic arm up and down the length of the truss.

Gerst has removed the light and is about to install the new one.

The next step in today's EVA is for Gerst to move to a location near the Destiny laboratory to replace a light. Wiseman continues cleaning up the work site at the external stowage platform now holding the failed pump module.

Passing the three-hour point in today's spacewalk. Wiseman is finishing up configuring thermal insulation around the failed pump module on the external stowage platform.

Mission control says the astronauts are about 15 minutes ahead of schedule so far in this EVA. Both told Houston they are feel well so far.

"EV1's feeling good right now," Wiseman said. "EV2, superb," Gerst replied.

"Really good work so far, and we're looking good on the timeline," said astronaut Doug Wheelock from mission control.

The spacewalkers have driven bolts to affix the pump module to an external mounting platform.

The the pump module now aligned and in position on the external stowage platform, the spacewalkers are preparing to firmly bolt the unit into place.

Wiseman is waiting at the external stowage platform for Gerst to arrive with the pump module.

The failed pump module, with a mass of about 385 kilograms (850 pounds), is now in the hands of Alexander Gerst after its release from a temporary stowage platform. Gerst will ride the robot arm to the pump module's long-term storage site on External Stowage Platform No. 2.

Gerst is now positioned at the pump module's temporary stowage site, known as the POA, on the space station's truss.

Astronaut Butch Wilmore is at the controls of the space station's robot arm inside the lab's windowed cupola module. Gerst has now attached himself to the arm's foot restraint in preparation for moving the failed pump module.

Gerst has installed the foot restraint onto the space station's robot arm and is preparing to latch himself in.

Once they finish gathering tools, the spacewalkers will prepare for today's first major task: the relocation of a failed ammonia pump module from a temporary storage location to a more secure long-term home outside the space station.

First, Wiseman will head to an external stowage platform to prepare it to receive the coolant pump module, which failed last December. Two spacewalks at the end of last year successfully swapped out the failed module for a fresh unit, but the astronauts ran out of time and were not able to more the bad module to a long-term storage location.

The failed module has been mounted on a robot arm transporter on the space station's truss since then.

Gerst will retrieve a foot restraint and attach himself to the end of the space station's 58-foot-long robotic arm to prepare for the pump module move.

Meanwhile, Wiseman will prep for a later task on the spacewalk by moving some wiring for the robot arm's mobile transporter power relay assembly, a system that will be set up once the pump module is moved.

Both astronauts are wearing helmet cams for today's spacewalk. The view with the No. 17 in the lower right corner is Wiseman. Gerst's camera is No. 20.

Wiseman and Gerst have both exited the Quest airlock. Wiseman is wearing a spacesuit with red stripes and Gerst is wearing the all white suit.

Wiseman and Gerst are both on their first spacewalks, and NASA planners have built in a few minutes at the beginning of the EVA to give the astronauts time to adjust to the environment outside the space station.

Today's spacewalk officially began at 1230 GMT (8:30 a.m. EDT) as Wiseman and Gerst switched their spacesuits to battery power.

With the airlock depressurized, the spacewalkers have opened the Quest module's hatch. The official start of today's EVA will come when the astronauts switch their spacesuits to internal battery power.

Astronauts Reid Wiseman and Alexander Gerst have climbed into their spacesuits, entered the crew lock of the space station's Quest airlock module, and begun depressurization ahead of the start of today's six-and-a-half hour spacewalk.

Space station astronauts will venture outside the complex Tuesday and again next week to move a failed ammonia pump to a more secure storage location, to replace an electrical component that will restore one of the lab's solar power channels to normal operation and to carry out a variety of maintenance tasks.

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Welcome aboard! The newest residents have floated into the International Space Station from their Soyuz capsule for welcoming ceremony.

Hatch opening occurred at 1:06 a.m. EDT (0506 GMT).

Soyuz TMA-14M commander Alexander Samokutyaev reports the spacecraft's port solar array has dislodged and fully extended some time after docking.

"It's fully deployed and as beautiful as they come," Samokutyaev just told mission control in Moscow.

"Now your vehicle is fully awake, finally" a ground controller replied.

The docking probe on the front of Soyuz has retracted, allowing the hooks and latches to close and form a seal between the capsule and station. Pressure and leak checks will be performed over the next orbit before the hatchway is opened for the crew to enter into the station in a couple of hours.

Over the next few minutes, the Soyuz docking probe will retract to allow hooks and latches to bring the spacecraft to a firm seal with the station. Hatches between the two vehicles will be opened around 11:55 p.m. EDT (0355 GMT).

Docking occurred over the Pacific Ocean off the coast of Ecuador.

DOCKING! The Soyuz TMA-14M spacecraft has docked to the Poisk module of the space station, delivering Russian cosmonauts Alexander Samokutyaev and Elena Serova, along with NASA astronaut Barry Wilmore to the international outpost for their five-and-a-half month space mission.

Standing by for contact and capture momentarily.

The Soyuz spacecraft is closing in on the Poisk docking port at 0.2 meters per second, or about one-half mile per hour.

Range is now 72 meters, or 236 feet.

The Soyuz completed the flyaround to align with the docking port. It's now on a computer-controlled final approach to the space station's Poisk module.

The flyaround has begun. Soyuz is flying itself around the international outpost to get into the approach corridor leading to the Poisk module's docking port. This flyaround occurs at a range of about 250 meters.

A camera mounted on the Soyuz spacecraft is now returning images of the space station, which is reported to be in the proper attitude for docking in 30 minutes.

Other than the stuck solar array, no major problems have been reported during the Soyuz rendezvous sequence. The Soyuz TMA-14M spacecraft has established a communications link with the International Space Station, the capsule's Kurs navigation radar has been activated, and the automated rendezvous is underway.

Docking with the space station's Earth-facing Rassvet module is set for one hour from now at 0215 GMT (10:15 p.m. EDT).

NASA has released the following update:

"Upon reaching its preliminary orbit following a flawless launch, only one of two power-producing solar arrays on the Soyuz TMA-14M spacecraft deployed. Soyuz Commander Alexander Samokutyaev and Flight Engineers Barry Wilmore and Elena Serova are in no danger as they prepare for docking to the space-facing Poisk module of the International Space Station at 10:15 p.m. EDT.

"The crew aboard the Soyuz and Russian flight controllers discussed the status of the spacecraft which is otherwise in perfect shape. Russian engineers believe the Soyuz can reach the International Space Station for a nominal docking later today as they continue to review data and troubleshoot the issue with the port array.

"Two rendezvous burns of the Soyuz engine to fine-tune its path to the station have been conducted normally."

The Soyuz TMA-14M spacecraft continues toward docking with the space station's Poisk module at 10:15 p.m. EDT (0215 GMT), despite a failure of one of its solar panels to properly deploy after launch, according to NASA.

One of the two power-generating solar arrays aboard the Soyuz TMA-14M spacecraft did not deploy as planned after the ship arrived in orbit, according to a NASA spokesperson at the Johnson Space Center in Houston.

Engineers are working to free the stuck port solar panel, but the Soyuz ferry craft can complete its planned four-orbit rendezvous sequence even with power from one array, the spokesperson said.

Russian Soyuz commander Alexander Samokutyaev, cosmonaut Elena Serova and NASA astronaut Butch Wilmore have arrived in orbit following a good launch aboard the Soyuz TMA-14M spacecraft from the Baikonur Cosmodrome.

Solar arrays have been unfurled aboard the spacecraft to generate electricity, and the first major orbit-adjustment maneuver is planned for 5:10 p.m. EDT (2110 GMT) to begin raising the capsule's altitude to match that of the space station.

A second "delta velocity" burn is set for 5:44 p.m. EDT (2154 GMT), followed by several more firings over the next few hours to set up for rendezvous and docking.

The 7.9-ton capsule's automated rendezvous sequence, guided by its Kurs radar system, will commence at 8:07 p.m. EDT (0007 GMT).

The Soyuz should be in position to start a flyaround maneuver at range of about 400 meters, or 1,300 feet, at about 9:51 p.m. EDT (0151 GMT) to line up with the docking port on the space station's space-facing Poisk module. Soyuz commander Alexander Samokutyaev will be standing by to take over manual flying of the spacecraft if required. Final approach will begin about 11 minutes before docking, which is scheduled for 10:15 p.m. EDT (0215 GMT).

The docking should occur 5 hours and 50 minutes after liftoff.

The craft is completing a programmed sequence to deploy the power-generating solar arrays, as well as antennas for navigational and communication systems.

T+plus 9 minutes. CAPSULE SEPARATION! The Soyuz spacecraft is flying free after the upper stage finished its engine firing and then separated away. The capsule is in pursuit of the International Space Station for a planned docking at 10:15 p.m. EDT (0215 GMT).

T+plus 8 minutes. About a minute remains in the propulsion by the upper stage. The motor consumes kerosene and liquid oxygen just like the Soyuz rocket's other powerplants.

T+plus 7 minutes. The four-nozzle RD-0110 engine of the upper stage continues to burn to put the spacecraft into orbit.

T+plus 6 minutes. Soyuz's upper stage is firing to propel the spacecraft into a stable orbital perch around Earth on the six-hour, four-orbit trek to catch the International Space Station.

T+plus 5 minutes. The core stage of the Soyuz rocket has shut down and separated at an altitude of approximately 105 miles, leaving the upper stage to complete the job of injecting the Soyuz capsule into orbit.

T+plus 4 minutes. The core RD-108A engine continues to fire on its propellant mixture of kerosene fuel and supercold liquid oxygen.

T+plus 3 minutes. The safety escape tower and launch shroud have been jettisoned from the atop the Soyuz capsule.

T+plus 2 minutes, 10 seconds. The four strap-on boosters clustered around the Soyuz rocket's main stage have burned out and separated. The core engine continues to fire as Soyuz streaks into space at more than 3,300 mph.

T+plus 60 seconds. Good performance one minute into this ascent for the Soyuz rocket and its three-person crew from the Kazakh launch base.

Cosmonaut Elena Serova is strapped into the left-hand seat serving as co-pilot, veteran commander Alexander Samokutyaev is in the center seat for his role as the Soyuz commander and NASA Barry "Butch" Wilmore is riding in the right-hand seat.

T+plus 30 seconds. Samokutyaev, Serova and Wilmore are beginning a five-and-a-half month expedition in space.

The Soyuz rocket has maneuvered on course for a rendezvous with the space station six hours from now. The station currently is flying 262 miles over southern Russia.

LIFTOFF! Liftoff of the Expedition 41 crew en route to the International Space Station for docking in six hours!

T-minus 40 seconds. The first umbilical arm has separated from Soyuz. The second will retract in the next few seconds.

T-minus 1 minute and counting. The Soyuz has been placed on internal power.

T-minus 2 minutes and counting. Rocket propellant tank pressurization is underway. The vehicle's onboard measurement system is activated. Oxidizer and fuel drain and safety valves of the launch vehicle have been closed.

T-minus 4 minutes and counting. The nitrogen purge of the combustion chambers of side and central engine pods of the rocket is being performed in preparation for ignition.

T-minus 5 minutes and counting. Soyuz has switched to onboard control, the ground measurement system and the capsule commander's controls are being activated.

T-minus 6 minutes. The automatic program for final launch operations is being initiated. And the launch key has been inserted in the bunker for liftoff.

Launch is set for 4:25:00 p.m. EDT (2025:00 GMT), the moment Earth's rotation carries the Baikonur Cosmodrome under the International Space Station's ground track.

T-minus 9 minutes and counting. The crew has closed its helmet visors.

T-minus 10 minutes. The crew inside the Soyuz capsule are starting recorders to collect data during launch.

T-minus 14 minutes. The Soyuz telemetry systems are being activated. They will relay real-time data back to Earth during today's launch.

T-minus 17 minutes. Now in the launch count, realignment of the Soyuz rocket's trajectory control system and checks of internal batteries should be complete. The Soyuz telemetry system will soon be activated and monitoring of Soyuz's thermal control system also will begin.

T-minus 20 minutes and counting. The three-stage Soyuz rocket will insert the 15,700-pound space capsule into a 143 by 118 mile orbit, inclined 51.6 degrees to the equator, according to NASA.

T-minus 22 minutes and counting. At the time of launch, the International Space Station will be flying 262 miles over northeast Kazakhstan. When the Soyuz TMA-14M spacecraft deploys from the Soyuz rocket's third stage, the space station will be flying 2,184 miles ahead of the Soyuz.

The space station will fly almost directly overhead the Baikonur Cosmodrome about three minutes before launch.

The capsule will close that distance over the next six hours, with docking to the space station's Poisk module scheduled for 10:15 p.m. EDT (0215 GMT).

T-minus 24 minutes. The crew is completing leak checks of the Sokol launch spacesuits at this point in the countdown.

T-minus 25 minutes and counting. The Soyuz rocket will fly northeast from the Baikonur Cosmodrome, jettisoning its launch escape tower 1 minutes, 54 seconds, after liftoff. Four seconds later, the rocket's four liquid-fueled strap-on boosters will separate as the core RD-108A engine, also known as the Block A second stage, continues firing.

The Soyuz launch shroud will release at T+plus 2 minutes, 37 seconds, followed by ignition of the third stage RD-0110 engine and separation of the Soyuz second stage at T+plus 4 minutes, 45 seconds.

The third stage's RD-0110 engine will fire for four minutes to inject the Soyuz spacecraft into orbit. Shutdown is set for T+plus 8 minutes, 45 seconds, followed by separation of the capsule in orbit three seconds later.

A series of communications and navigation antennas will deploy moments later as the Soyuz begins its six-hour chase of the International Space Station.

Docking is set for 10:15 p.m. EDT (0215 GMT).

T-minus 27 minutes and counting. The emergency escape system is being armed. The system would be employed if a major malfunction occurs, propelling the Soyuz capsule off the top of the rocket to safety.

T-minus 40 minutes and counting. The two-piece service structure which enclosed the Soyuz rocket is being retracted to a horizontal position. The towers protected the rocket and provided workers and the Soyuz crew with access to the spacecraft since the rocket arrived at the launch pad at sunrise Sunday.

Several other umbilical arms connecting the rocket to the ground will be retracted at various times later in the countdown.

T-minus 50 minutes and counting. Soyuz TMA-14M commander Alexander Samokutyaev, cosmonaut Elena Serova and NASA astronaut Butch Wilmore were awakened about eight hours ago to begin launch day activities.

They signed the doors at the Cosmonaut Hotel and received religious blessings before boarding a bus that took the three crewmates the 25-mile distance into the cosmodrome. They donned their white Sokol launch and entry suits, met with officials from their respective space agencies and then headed for the pad. Crowds of well-wishers gathered to wave goodbye as the crew reached the rocket. An elevator took the trio up to the capsule-level of the tower to begin climbing aboard the cramped spacecraft.

T-minus 55 minutes. Live streaming video coverage of today's rocket flight to orbit begins now.

T-minus 90 minutes. The Soyuz rocket is fueled, the crew has traveled to the launch pad and the countdown is progressing toward liftoff of the space station's Expedition 41 crew from the Baikonur Cosmodrome at 4:25 p.m. EDT (2025 GMT).

Live launch coverage and commentary begins in the stream at 3:30 p.m. EDT.

The three-person crew has arrived at Launch Pad No. 1 at the Baikonur Cosmodrome, where they will take an elevator ride to the top of the Soyuz rocket to board the Soyuz TMA-14M spacecraft for liftoff at 2025 GMT (4:25 p.m. EDT).

The crew is led by Alexander Samokutyaev, a 44-year-old Russian Air Force pilot selected as a cosmonaut candidate in 2003. Samokutyaev logged 164 days aboard the International Space Station as flight engineer on the Expedition 27 and Expedition 28 crews in 2011.

Samokutyaev will occupy the capsule's center seat, with rookie Russian cosmonaut Elena Serova and NASA astronaut Butch Wilmore flanking him in the left and right couches.

Serova will be the primary flight engineer, assisting Samokutyaev with control duties during the launch and docking, which is set for 0215 GMT (10:15 p.m. EDT), less than six hours after liftoff.

Making her first spaceflight, Serova is a 38-year-old aerospace test engineer who worked in the Russian space program at the Moscow mission control center before her selection as a cosmonaut candidate in 2006. She will be the first Russian woman to fly to the International Space Station.

NASA astronaut Barry "Butch" Wilmore, 51, is making his second flight into space after serving as pilot aboard space shuttle Atlantis on the STS-129 mission in 2009. Wilmore spent nearly 11 days in space on Atlantis, and he will take over as commander of the space station's Expedition 42 mission later this year.

An experienced Russian cosmonaut, a NASA shuttle veteran and the first female cosmonaut to be assigned to the International Space Station geared up for launch Thursday aboard a Soyuz ferry craft for a four-orbit flight to the laboratory complex.

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The Soyuz rocket assigned to carry the International Space Station's next three-person crew into orbit rolled out to its launch pad Tuesday in Kazakhstan.

The three-stage rocket is set to launch Thursday (U.S. time) from Launch Pad No. 1, the facility where Russian cosmonaut Yuri Gagarin launched on the first human spaceflight in April 1961.

Russian cosmonaut Alexander Samokutyaev will command the Soyuz TMA-14M space capsule. Cosmonaut Elena Serova, the first Russian woman to fly to the International Space Station, and veteran NASA astronaut Butch Wilmore will accompany Samokutyaev on the journey.

Tuesday's rollout began at sunrise, with the rocket riding horizontally on a railroad transporter for the trip to the launch pad. Once it arrived, the rocket was hoisted upright over the launch pad's flame trench, and access platforms raised to enclose the launcher.

Liftoff is set for 2025 GMT (4:25 p.m. EDT) Thursday, or 2:25 a.m. local time Friday in Kazakhstan.

Check out photos of the Soyuz rollout.