Nasa explores how to keep international space station in orbit without Russian help.

Extract from The Guardian

Nasa

Space agency says Northrop Grumman and SpaceX could assist after Russia raises prospect of pulling out over sanctions punishing its invasion of Ukraine.

• Ukraine Russia news: latest updates

Russian cosmonauts and a Nasa astronaut train together ahead of their trip to the international space station in March last year. Nasa is working out how to keep the ISS going if Russia pulls out over its invasion of Ukraine.

Agence France-Presse

Tue 1 Mar 2022 14.20 AEDT

Last modified on Wed 2 Mar 2022 05.11 AEDT

Nasa is exploring ways to keep the international space station in orbit without Russian help, but doesn’t see any immediate signs Moscow is withdrawing from the collaboration after the invasion of Ukraine.

The US side of the international space station (ISS) supplies power and life support, Russia is responsible for propulsion and keeping the station afloat: it does this by using docked Progress spacecraft to periodically give the station a boost to maintain its altitude of approximately 400km (250 miles).

Last week, though, Russia’s Roscosmos space chief Dmitry Rogozin raised the prospect of pulling out of the partnership in response to US sanctions.

Kathy Lueders, who heads the agency’s human spaceflight program, said US aerospace and defense company Northrop Grumman had offered a reboost capability.

“And, you know, our SpaceX folks are looking at can we have additional capability,” she said.

International Space Station will plummet to a watery grave in 2031

Read more

Lueders added that operations at the space station were proceeding “nominally” and “we’re not getting any indications at a working level that our counterparts are not committed”.

“That said, we always look for how do we get more operational flexibility and our cargo providers are looking at how do we add different capabilities,” she said.

The last Northrop Grumman Cygnus cargo vessel that arrived at the ISS on 21 February was the first to boast a capacity to “reboost” the outpost without Russian help.

On Friday, SpaceX boss Elon Musk tweeted his company’s logo in response to Rogozin’s rhetorical question about who would save the ISS from an uncontrolled de-orbit.

But Lueders stressed that such plans were a contingency measure only. “It would be very difficult for us to be operating on our own – ISS is an international partnership that was created … with joint dependencies,” she said.

“As a team, we are looking at where we may have operational flexibilities, but … it would be a sad day for international operations if we can’t continue to peacefully operate in space,” she said.

A symbol of post cold war detente, the ISS has been continuously habited for more than 21 years and has weathered past geopolitical storms, notably Russia’s invasion of Crimea in 2014. But some observers believe the invasion of Ukraine could hasten the demise of US-Russian space cooperation.