How Long Does it Take for One Galactic Year to Pass?
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter that is gravitationally bound. The phrase comes from the Greek word galaxias, which means milky’ and refers to the Milky Way galaxy, which houses the Solar System. Galaxies range in size from dwarfs to giants, each orbiting their galaxy’s center […]
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