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In the '20s Edwin Hubble discovered that the Milky Way is just one of millions of galaxies and he showed that the galaxy is expanding.
Basically, his discovery was that most galaxies move away from us; and that the galaxies that are farther away, also tend to move away faster.
In the late 1920s, the astronomer Edwin Hubble discovered that most of the galaxies he observed were moving away from Earth.
Edwin Hubble proved that there are other galaxies spread throughout the universe, and that these galaxies move away from each other as the universe expands. He further found that the galaxies in the outermost areas of the universe move faster that those nearer the middle, a feature in his Hubble's Law.
Edward Hubble (1989-1953)= 36 years
The Hubble telescope did not discover that there is a red shift in the spectra of Galaxies. The telescope is named after the American astronomer, Edwin Hubble, who discovered the phenomenon in the 1920s.
Edward Hubble
If the galaxies are meant, it is credited to Edwin Hubble and became known as "Hubble's Law".
In the '20s Edwin Hubble discovered that the Milky Way is just one of millions of galaxies and he showed that the galaxy is expanding.
spiral galaxies elliptical galaxies and irregular galaxies
Hubble did not discover that there were other galaxies; that had been discovered earlier. But Hubble was the first to demonstrate that the more distant another galaxy is, the faster it is moving away from us. Edit: I'm not sure that's right. Hubble was surely the first to prove that a "spiral nebula" was too far away to be in the Milky Way. That nebula is what we now call the "Andromeda galaxy". I know that Slipher and others did important earlier work on red shifts, but I'm pretty sure Hubble did discover that other galaxies existed.
Galaxies are moving away from each other in a constantly expanding universe
the hubble telescope edwin hubble :)
what is the type of star used by the Hubble to measure the distance to other galaxies.
Basically, his discovery was that most galaxies move away from us; and that the galaxies that are farther away, also tend to move away faster.
Hubble.
The Serperation of Galaxies which was caused by Dark Energy, and the Big Bang.