WTF Fun Fact 13676 – We Can’t Burp in Space

People can’t burp in space.

Now, you might wonder, why on Earth (or rather, off Earth) can’t astronauts do something as simple as burping? It boils down to gravity, or the lack thereof.

Why We Can’t Burp in Space

Here on Earth, gravity does a lot of work for us without us even noticing. When you eat or drink, gravity helps separate the liquid and gas in your stomach. The solids and liquids stay at the bottom, while the gas, being lighter, floats to the top. When there’s enough gas, your body naturally expels it as a burp. Simple, right?

But, take gravity out of the equation, and things get a bit more complicated. In space, there’s no up or down like here on Earth. This means that in an astronaut’s stomach, gas doesn’t rise above the liquid and solid. Instead, everything floats around in a mixed-up blob.

If an astronaut tries to burp, they’re not just going to expel the gas. No, they might bring up some of the liquid and solid matter too. Not exactly pleasant, and definitely something you’d want to avoid.

NASA Burp Training

NASA, being aware of this, actually trains astronauts on how to eat and drink in a way that minimizes the chances of needing to burp. They choose foods that are less likely to produce gas. Also, space food is designed to reduce crumbs and loose particles, which can be a nuisance in microgravity. Even with these precautions, though, the human body can still produce gas, thanks to the digestion process.

So, what happens to all that gas if it can’t come out as a burp? Well, it has to go somewhere. The body adapts in interesting ways. The gas might get absorbed into the bloodstream and expelled through the lungs. Or it might travel through the digestive tract and leave the body as flatulence. Yes, astronauts can still fart in space, which, without gravity to direct the flow, might be a bit more… interesting.

This isn’t just a quirky fact about space travel; it has real implications for astronaut health and comfort. Gas build-up can cause discomfort, bloating, and even pain. In the confined, zero-gravity environment of a spacecraft, managing these bodily functions becomes crucial for maintaining the well-being and harmony of the crew.

Bodies in Space

It’s funny to think about, but this no-burp scenario highlights a broader point about space travel. Living in space requires us to relearn and adapt basic bodily functions. Everything from sleeping to eating to going to the bathroom is different up there. Astronauts undergo extensive training to prepare for these challenges, learning how to live in a world without gravity’s guiding hand.

In the grand scheme of things, the inability to burp is just one small part of the vast array of adjustments humans must make to thrive in space. It serves as a reminder of how finely tuned our bodies are to life on Earth, and how much we take for granted the invisible forces that shape our everyday experiences.

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Source: “Ask an Explainer” — Smithsonian Institution


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