In 1923, Edwin Hubble showed that the "spiral nebulae" that were presumed to be within our galaxy, the Milky Way, were actually other galaxies that lay far beyond our. The following year, he showed that the Milky Way was just one of many galaxies in the universe. Hubble's discovery, announced on January 1, 1925, fundamentally changed the view of the universe.
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.
a telescopeIn 1925, Edwin Hubble discover cepheid variable(s) in what we now call the Andromeda Galaxy. From those he could tell that the group of stars was too far away to be part of the Milky Way. It was the first proof that other galaxies exist.
First, one from the lighter side of life: the Ford Galaxie (it's a car!).Okay, here's another: Messier than you, the Messier 82 (actually, a 'nearby' starburst galaxy [12 million light years away!] in the Ursa Majorconstellation).The closest galaxy to our own is the Canis Major Dwarf.The first found (in 1923, by Edwin Hubble) are the Andromeda Galaxy and the Milky Way Galaxy. Hubble determined that they were two separate galaxies (so far).Okay, so then there's Cygnus A, Malin 1, Omega Centauri, and the Whirlpool Galaxy.There really are many more, but these are the easiest for me to remember because they actually have names, instead of numbers.See the related Wikipedia link listed below for more information:
Edwin Fancher was born in 1923.
Edwin Busuttil was born in 1923.
Edwin Gaustad was born in 1923.
Edwin Romanzo Elmer died in 1923.
Edwin Maffitt Anderson died in 1923.
Edwin T. Hall died in 1923.
Homer Hoyt was born in 1895.
Edwin Boring died on January 18, 1923, in Bronx, New York City, New York, USA.
He was born in Salt Lake City Feb. 15, 1923.