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Astronomers now speculate that a galaxy's shape depends on all of the following except
Q12: The Sun is located near a spiral
Q15: Although neutron stars are very hot, they
Q16: in the following cartoon, infrared radiation is
Q16: The elements hydrogen and helium were made
Q24: Due to the dust in the interstellar
Q32: What evidence do we have that the
Q44: When an aging massive star generates an
Q49: Synchrotron radiation occurs when high-speed electrons move
Q92: Old stars are poor in heavy elements
Q94: What will eventually happen to a star