Georges Lemaître Proposed the Idea Behind the Big Bang in 1927
The Belgian priest suggested that the universe began from a primeval atom.
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Measurements of the Universe's Expansion Rate Disagree
The mismatch, known as the Hubble tension, remains unresolved.
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Fred Hoyle Coined the Term Big Bang in 1949
He used it on BBC radio while favoring a rival steady-state theory.
Cosmology47 views
Alan Guth Proposed Cosmic Inflation in 1980
The theory says the universe expanded extremely rapidly in a tiny fraction of the first second.
Cosmology44 views
Vera Rubin's Galaxy Rotation Studies Supported Dark Matter
Stars in the outer parts of galaxies orbit faster than visible matter can explain.