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Whose observations first suggested the universe is expanding?
SpaceCosmology
Quick Answer
Edwin Hubble’s observations in the 1920s showed that distant galaxies are moving away from us. This became the basis for the expanding universe idea.
The Full Story
Edwin Hubble used observations at Mount Wilson Observatory in the 1920s to measure distances to galaxies and compare them with their redshifts. He found that more distant galaxies recede faster, a relationship now known as Hubble’s law. This provided key evidence that the universe is expanding. His results transformed cosmology and helped lead to the Big Bang model.
Key Facts
1.Key work published in 1929
2.Hubble’s law links distance and recession speed
3.Observations made at Mount Wilson Observatory
YouTube Angle
Suggested video title for this topic:
"The discovery that the universe itself is stretching."