45 million light-years
The Antennae are two galaxies that are in the process of merging. The cores of the galaxies are seen in yellow, while blue stars and red star-forming regions show the spiral arms in their complex interweaving dance. Astronomers think this is the fate awaiting the Milky Way and our neighbour, the Andromeda Galaxy, in a few billion years from now.
Credit: Image made in visible light by the NASA / ESA Hubble Heritage Team.
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