What did Edwin Hubble discovery about galaxies in the universe?
Hubble wanted to classify the galaxies according to their content, distance, shape, and brightness patterns, and in his observations he made another momentous discovery: By observing redshifts in the light wavelengths emitted by the galaxies, he saw that galaxies were moving away from each other at a rate constant to …
When did Edwin Hubble discover the movement of galaxies?
Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding. He announced his finding in 1929.
What were Edwin Hubble’s two discoveries?
Astronomer Edwin Hubble revolutionized the field of astrophysics. His research helped prove that the universe is expanding, and he created a classification system for galaxies that has been used for several decades.
How did Edwin Hubble discovered that galaxies are moving away?
By plotting the distance of eighteen galaxies against their red shifts, Hubble discovered a direct relationship: Galaxies were moving away from earth at a rate proportional to their distance from us. In other words, the greater the distance between a galaxy and the earth, the faster that galaxy was moving away from us.
How many galaxies did Edwin Hubble discover?
But the most astonishing discovery Hubble made resulted from his study of the spectra of 46 galaxies, and in particular of the Doppler velocities of those galaxies relative to our own Milky Way galaxy.
Did Edwin Hubble invent the Hubble telescope?
Hubble Space Telescope Facts. NASA named the world’s first space-based optical telescope after American astronomer Edwin P. Hubble (1889 — 1953). Hubble confirmed an “expanding” universe, which provided the foundation for the big-bang theory.
Why was Hubble’s discovery important?
Who first discovered galaxies?
The first galaxies were identified in the 17th Century by the French astronomer Charles Messier, although at the time he did not know what they were. Messier, who was a keen observer of comets, spotted a number of other fuzzy objects in the sky which he knew were not comets.
Who first discovered Andromeda galaxy?
Around the year 964, the Persian astronomer Abd al-Rahman al-Sufi was the first to describe the Andromeda Galaxy.
Who discovered other galaxies?
1923 — Edwin Hubble resolves the Shapley–Curtis debate by finding Cepheids in the Andromeda Galaxy, definitively proving that there are other galaxies beyond the Milky Way.