The launch of the Soyuz-2.1a launch vehicle with the Soyuz MS-25 manned spacecraft took place on the second attempt

The launch of the Soyuz-2.1a launch vehicle with the Soyuz MS-25 manned spacecraft took place on the second attempt

On March 23, 2024, the launch of the Soyuz-2.1a launch vehicle with the Soyuz MS-25 manned spacecraft from pad number 31 (“East”) of the Baikonur Cosmodrome was successfully carried out on the second attempt.

The crew of the ship includes the participants of the 21st expedition to visit the International Space Station (ISS), Roskosmos cosmonaut Oleg Novytskyi, the participant of the space flight from the Republic of Belarus Marina Vasilevska, as well as the participant of the 71st long-term expedition to the station astronaut NA.

The launch of the Soyuz MS-25 into the specified orbit, its separation from the third stage of the rocket, and the opening of the antennas and panels of the ship’s solar batteries took place as usual.

The flight to the ISS “Soyuz MS-25” will take place according to a two-day approach scheme. The ship is expected to dock at the Berth Universal Node Module of the Russian segment of the station on Monday, March 25 at 6:10 p.m.

Novytskyi and Vasilevska will stay at the ISS for 12 days and will return on April 6 aboard the Soyuz MS-24 spacecraft with NASA astronaut Loral O’Hara. Dyson’s mission will last until September, after which it will return to Earth together with Roskosmos cosmonauts Oleg Kononenko and Mykola Chub.

On March 21, the Soyuz-2.1a launch with the Soyuz MS-25 manned spacecraft was automatically canceled 20 seconds before the start due to a drop in the voltage of the chemical current source.

The incident with the cancellation of the launch of a manned ship immediately before the start happened for the first time in the history of domestic cosmonautics. Cosmonautics historian Oleksandr Zheleznyakov told the media about this. “In the history of domestic cosmonautics, launches of manned ships have not been canceled just before the start command.” There were other excesses, but there were no such incidents. It happened with unmanned ones, but not with manned ones,” explained Zheleznyakov.

“Indeed, 20 seconds before the start, the automatics stopped the cyclogram of the launch preparation due to receiving information about the voltage drop in the chemical current source,” – said the head of “Roscosmos” Yury Borisov following the results of the successful launch of “Soyuz-2.1a” from the cosmodrome. He added that the crew was evacuated within an hour. “Everyone has probably encountered the fact that the car’s battery boils. It looks like that. This unfortunate error occurred due to incorrect operation of the thermostat relay. The correction took place normally. We were absolutely sure of the serviceability of the carrier rocket,” Borisov said. According to him, the Soyuz MS-25 crew is now in orbit and is feeling fine.

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