👤 whose
Whose measurements helped discover that the universe is expanding?
Quick Answer
Vesto Slipher made the first key redshift measurements of spiral nebulae. His observations in the 1910s showed many were moving away from us.
The Full Story
Vesto Melvin Slipher, an American astronomer at Lowell Observatory, measured the spectra of spiral nebulae beginning in 1912. He found that many of them had large redshifts, meaning they were receding at high speed. These measurements were crucial evidence later used to support the expanding-universe model. Slipher’s work laid the observational groundwork for Edwin Hubble’s famous distance-redshift relation.
Key Facts
1.Slipher began the measurements in 1912
2.He found large redshifts in many spiral nebulae
3.His data supported the expanding universe
YouTube Angle
Suggested video title for this topic:
"The hidden data that pointed to an expanding universe"
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