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cosmological principle
cosmology
Crab Nebula
crater
crater counts
craters
critical density
Curtis
Cygnus X-1
Dactyl
dark energy
dark matter
dark matter halo
Darwin
Davis
declination
degenerate gas
Deimos
Delta Cephei
detector
Astronomy
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Astronomy
is licensed under
Creative Commons Attribution
Copyright (c) 2019 High Castle Tech LLC