how do astronauts go to the bathroom in space

Astronauts use specially designed space toilets that rely on suction instead of gravity. For urine, they use a funnel and hose; for solid waste, they sit on a small seat while airflow keeps everything contained and pulls waste away.

Quick Scoop

In microgravity, nothing naturally “falls” into a toilet, so the bathroom has handholds and footholds to keep astronauts in place. The toilet starts suctioning as soon as the lid is opened, which helps prevent waste from drifting and also controls odor.

How it works

• Peeing: astronauts can sit or stand and hold a funnel tightly against the body so urine gets sucked into the system.

• Pooping: they sit on a smaller toilet seat, and vacuum airflow pulls waste away immediately.

• Cleaning up: waste is stored in sealed containers, and much of it is sent away on cargo craft that burn up in the atmosphere.

Why it’s tricky

Earlier space toilets were awkward and harder to use, especially for women, so NASA later funded a redesigned vacuum toilet for the ISS. The goal is comfort, hygiene, and keeping sensitive equipment safe in a zero-gravity environment.

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