If famous astronomer Edwin Hubble was still alive today, he would be 125 years old! Having a famous NASA telescope named after him, Edwin Hubble proposed multiple theories and conclusions that still hold true today. Unlike many astronomers in the 1920s, Hubble suggested that our Milky Way Galaxy is not the only galaxy and that our universe is expanding. For example, he found out that the Andromeda "spiral nebula" - formerly believed to be part of the Milky Way - is actually the Andromeda Galaxy. Hubble serves as a role model for contemporary astronomers because he pushed through unpopular ideas that turned out to be true!
More informative information about Edwin Hubble can be found at EarthSky.
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