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sun bicycle earth fixed star
12-20
Andromeda Galaxy galaxy fixed star Galaxy
12-19
planet Galaxy solar system fixed star Exoplanets galaxy
12-18
general relativity Einstein pulsar physics fixed star
12-16
black hole astronomer dessert fixed star earth
Galaxy fixed star European Southern Observatory black hole Sagittarius a*
Proxima Centauri sun earth fixed star Centaurus α star South Gate II
12-15
spider male planet fixed star
metal gold fixed star supernova earth
12-14
earth light-year fixed star sun supernova
12-13