what did Hubble's discovery mean.....
Answers
Hubble discovered that many objects previously thought to be clouds of dust and gas and classified as "nebulae" were actually galaxies beyond the Milky Way. ... The Hubble–Lemaître law implies that the universe is expanding.
Parents: Virginia Lee Hubble, John Powell Hubble
Astronomical objects discovered: 1373 Cincinnati
Profession: Astronomer
Works written: Photographic Investigations of Faint Nebulae, The realm of the nebulæ
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Answer:
No matter where the explosion occurred, an observer on any galaxy would see other galaxies moving away from him. Hubble's law states that
The Milky Way is expanding. ...
The redshifts of distant galaxies are proportional to their distances from the center of the Universe.