How do spacewalks keep astronauts from drifting away?
Quick Answer
Astronauts wear safety tethers and often use a jetpack-like emergency device called SAFER. They also stay attached to the station structure during most tasks.
The Full Story
During a spacewalk, astronauts are connected to the spacecraft or station by tethers so they remain anchored while working outside. They also use handrails and foot restraints to keep their bodies stable as they move along the exterior. For emergencies, astronauts wear the Simplified Aid For EVA Rescue, or SAFER, a small nitrogen-jet backpack that can help them return if they become untethered. Spacewalks are carefully rehearsed because even a tiny mistake can be dangerous in vacuum, where there is no air to slow motion or provide breathing support.
Key Facts
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