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Whose observations helped prove that galaxies exist beyond the Milky Way?
ScienceSpace
Quick Answer
Edwin Hubble showed in 1924 that the Andromeda “nebula” was a separate galaxy. This proved the universe is much larger than the Milky Way.
The Full Story
Using Cepheid variable stars, Edwin Hubble measured the distance to Andromeda in 1924. He showed it was far beyond the Milky Way and therefore a separate galaxy, not just a nearby cloud of gas. This transformed astronomy by revealing a universe filled with galaxies. Hubble’s result is one of the great turning points in modern cosmology.
Key Facts
1.1924: Andromeda identified as a separate galaxy
2.Cepheid variables were key to the distance measurement
3.The Milky Way is just one of billions of galaxies
YouTube Angle
Suggested video title for this topic:
"The discovery that our galaxy is only one of many"