Although galaxies appear throughout the sky, they are not spread evenly. They are found in small groups and larger clusters, and can be as close as the dwarf galaxies that orbit the Milky Way or as far away as the best telescopes can detect.

There is also a swath of sky where galaxies are few and far between. Pioneer galaxy observer Edwin Hubble called this the Zone of Avoidance. It is so named because the vast amount of stars, dust, and gas of the Milky Way’s plane overwhelm or block th

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