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Deep images of the sky reveal that the universe contains billions of galaxies. Some, such as our own Milky Way, are immense, containing hundreds of billions of stars. Most [...]
Our neighboring galaxy Andromeda is being circled by about 30 smaller galaxies, half of which are in a vast thin plane like a pancake.
The emerald-cut galaxy is extremely unusual as most galaxies exist in three forms: disc-like, spheroidal, or lumpy and irregular in appearance.