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What did Edwin Hubble's 1929 measurements of distant galaxies' redshift show?
Confirmed
That the universe is expanding
More distant galaxies are moving away faster, a relationship now called Hubble's law.
About how old is the universe?What is the cosmic microwave background?About how much of the universe's total energy is the ordinary matter that makes up stars, planets and people?What is expected to happen to the Milky Way and the Andromeda galaxy in about 4 to 5 billion years?Roughly how much would a teaspoon of neutron star material weigh?About how old is the light we see from the Andromeda galaxy?