Meaning & use
Hubble's law
The astronomical principle that a galaxy's speed moving away from us increases with its distance from Earth.
See it in a sentence
Hubble's law provided key evidence that the universe is expanding.
Astronomers use Hubble's law to estimate how far away distant galaxies are.
A note on using this word
Hubble's law is named after astronomer Edwin Hubble, who first observed the relationship in 1929.
Words with a similar meaning
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