system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can the moons gravity cause the tides on earth from over 380,000 km away, yet cannot sustain its own atmosphere?
gpt
Particles of gas move really fast. The gas particles that would have made up the Moon's atmosphere were moving quick enough to escape its gravity, like we do with rockets. The moon's gravitational force (on its surface) is a little less than a fifth of that on Earth. That's enough to tug on the non-rigid oceans a little bit.