Explaining The Universe on Instagram: "In space, water behaves very differently than on Earth due to microgravity and the lack of atmospheric pressure. Instead of falling or forming puddles, water forms spherical blobs because of surface tension, which holds the molecules together. These floating spheres can merge, stick to surfaces, or move when pushed, since there is no gravity to make them fall. In the vacuum of space, water exposed outside a spacecraft would quickly boil at low temperatures,