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earthsky.org
QNn5a
TIL Saturn rings disappear every few years
l7RmN
TIL that the moon is 1/400th the size of the sun but also 1/400th the distance from Earth which results in the moon and the sun being the same size in the sky, a coincidence not shared by any other known planet-moon combination.
69Y4Q
TIL that the second star in the big dipper constellation is a double star visible to the naked eye