A question
Why do astronauts float?
A calm, true answer. Then, if the wondering keeps going, the whole episode.
The short answer
Not because they have escaped gravity. Gravity is still nearly as strong up there as it is in your bedroom.
They float because they are falling. The station moves sideways so fast that it keeps missing the Earth as it falls, curving around instead of coming down, and everything inside is falling at exactly the same rate. That endless shared fall is what floating is.
Go deeper tonight
International Space Station: Sixteen Sunrises
The full episode, in one calm voice, with nothing that startles.
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11:31
Sleep timer
Read the guide for this one in the morning.
This connects to
One idea turns up in many different nights. Follow one and the library starts to join up.