Ask an Explainer

Not really–at least not the kind of burping we do here on Earth.

In space, astronauts are in a constant state of freefall, so gravity doesn't help separate gases from everything else in their stomachs. This means that the gases don't naturally stay near the top of the stomach, while the heavier liquids and solids settle to the bottom. Without the affect of gravity, the gases, foods, and liquids stay floating together. So if an astronaut tries to burp in space, a little bit of everything comes up (solids, liquids, and gases). Basically, burping in space means throwing up a little.