Astrum
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Astrum Answers 21st Oct 2020
🕑 Added 2020-10-21 13:41:59 +0000 UTCTime for a new poll. What video do you want to see made next?
Comments
Andrew Fleckenstein
Galaxy rotation is a fascinating concept!
ImmortalSpaceKnight
Dark Matter plays a role too
Dave Mausner
Be sure to explain how astronomers can figure out rotations of such things.
Dave Mausner
Slowly ??