3 spaceflyers arrive at the ISS aboard Russian Soyuz spacecraft

Three spaceflyers have arrived at the International Space Station (ISS) after a roughly two-day orbital chase.

Russia’s Soyuz MS-25 spacecraft docked with the ISS today (March 21) at 11:03 a.m. EDT (1503 GMT), about 50 hours after launching from Baikonur Cosmodrome in Kazakhstan.

Flying on the Soyuz are NASA astronaut Tracy C. Dyson, Oleg Novitskiy of the Russian space agency Roscosmos and Marina Vasilevskaya, a spaceflight participant from Belarus.

The hatches between the Soyuz and the ISS are expected to open around 1:40 p.m. EDT (1740 GMT) today. You can watch that event, along with a welcome ceremony hosted by the orbiting lab’s current residents, live here at Space.com, courtesy of NASA TV. Coverage will begin at 1:15 p.m. EDT (1715 GMT).

Related: International Space Station — Everything you need to know

three smiling astronauts (two women and one man) in white spacesuits sit in front of their national flags against a dark background

three smiling astronauts (two women and one man) in white spacesuits sit in front of their national flags against a dark background

This is the fourth spaceflight for Novitskiy, the third for Dyson and the first for Vasilevskaya.

Dyson will stay in orbit for about six months, serving as a flight engineer for ISS’ Expeditions 70 and 71. Novitskiy and Vasilevskaya, however, will live on the station for just 12 days or so; they’ll come home in early April aboard a different Soyuz, along with NASA’s Loral O’Hara.

O’Hara arrived at the station last September, aboard a Soyuz that also carried cosmonauts Oleg Kononenko and Nikolai Chub. Kononenko and Chub are about halfway through their planned yearlong orbital stay; they’ll come back to Earth in September with Dyson.


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Kononenko, Chub and O’Hara aren’t the only astronauts who will welcome the Soyuz MS-25 trio aboard the ISS today.

There are four other astronauts on the orbiting lab as well, who arrived earlier this month on SpaceX’s Crew-8 mission for NASA. Those four, who will stay up for about six months, are NASA’s Matthew Dominick, Michael Barratt and Jeanette Epps, and Alexander Grebenkin of Roscosmos.

Soyuz MS-25 was originally supposed to launch on Thursday morning (March 21) and arrive at the ISS that same day. But an electrical issue with its rocket ride forced an abort that day, and a launch delay to Saturday.

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