1. What is a spacewalk?
A spacewalk, or extravehicular
activity (EVA), is when an astronaut leaves their spacecraft to work in space.
2. How long does a typical spacewalk
last?
Usually 5-8 hours.
3. What do astronauts wear during
spacewalks?
Extravehicular Mobility Units (EMUs)
or spacesuits, which provide oxygen, temperature control, and protection from
radiation.
4. Why do astronauts perform
spacewalks?
To conduct repairs, installations,
experiments, and maintenance on spacecraft or satellites.
5. How do astronauts move during
spacewalks?
They use handrails, tethers, and
sometimes jetpacks called Simplified Aid for EVA Rescue (SAFER).
6. What dangers do astronauts face
during spacewalks?
Radiation exposure, micrometeorites,
equipment failure, and the risk of becoming untethered.
7. How do astronauts communicate
during spacewalks?
Through radio systems in their
helmets.
8. How many spacewalks have been
performed?
As of 2024, over 400 spacewalks have
been conducted.