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Whose observations first suggested that the universe is expanding?
ScienceSpace
Quick Answer
Edwin Hubble’s observations in the 1920s showed that distant galaxies are moving away from us. This became evidence that the universe is expanding.
The Full Story
Edwin Hubble used the 100-inch Hooker Telescope at Mount Wilson Observatory to study galaxies in the 1920s. In 1929 he published evidence that galaxies’ redshifts increase with distance, now called Hubble’s law. The result supported the idea of an expanding universe and transformed cosmology. Hubble’s work helped establish that the Milky Way is only one galaxy among many.
Key Facts
1.1920s: Hubble studied distant galaxies
2.1929: Hubble’s law published
3.The Hooker Telescope was 100 inches across
YouTube Angle
Suggested video title for this topic:
"The discovery that the universe is growing larger"