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2026
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Source-derived question
Why does an expanding universe imply that everything was once in the same place?
Big Bang Theory
Cosmology
Sources that address it
Hubble publishes observational evidence of expanding universe
almanac
Related questions
How did astronomers use Type Ia supernovae to measure the expansion rate of the universe?
What did the redshift of 3C 273 imply about its distance and energy output?
What later discoveries about the universe followed from Hubble's proof that other galaxies exist?
What relationship did Hubble find between a galaxy's distance and its recession velocity?
Who independently proposed the steady-state theory in 1948, and how did their papers differ?
How cold is the afterglow of the Big Bang today, and why has it cooled so much?
How did Edwin Hubble use Leavitt's relation to prove the Andromeda nebula lay outside the Milky Way?
How did Georges Lemaître anticipate Hubble's Law two years earlier, and why did his paper go unnoticed?