Dodging the kind of meteorite strike that forced Russia to plan a space station rescue mission is nearly impossible, yet the greater threat to spacecraft is actually the man-made debris in orbit, experts say.
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The micrometeorites can be travelling at speeds from 10 to 30 kilometres a second — “much faster than a shotgun bullet,” Schmitt said. That is because colliding space junk creates even more debris, leading to a “runaway chain reaction” of cascading collisions littering orbit with tiny, dangerous objects, NASA says.
Russia provoked criticism from NASA in 2021 when Moscow destroyed one of its own satellites during a missile test, creating more than 1,500 pieces of debris and forcing those onboard the ISS to take shelter. The US Department of Defense tracks objects orbiting Earth, mostly those larger than 10 centimetres .
Normally if a critical event occurred on the station, the crew would hypothetically be able to return to Earth within three hours.
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