The best thing about being in zero gravity (aside from being in zero gravity, of course) has to be how liquids become amorphous blobs that can just float around. Here’s a collection of awesome experiments that NASA has conducted of water in zero gravity. They’re amazing!
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DISCUSSION
“Playing with water in zero gravity”
I do wish people would stop referring to freefall as “zero gravity”. It’s quite inaccurate and very misleading. Astronauts on the ISS experience 89% of the gravity that we do on the surface of the Earth. When astronauts say “zero-g”, they don’t mean “zero gravity”, they mean “zero g-force”, which is quite different.