Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...
Astronomers now know that galaxies are isolated systems of stars, much smaller than the space between them. Edwin Hubble was young and ambitious. At the of age 30, he arrived at Mount Wilson ...
Curtis argued that the spiral nebulas were galaxies in their own right, but said that the Milky Way was only 10,000 light ...
"It looks like it has been through some kind of event that caused it to form a lot of stars and then just shut down” ...
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...
other galaxies in their own right. The scale of the cosmos had expanded dramatically virtually overnight. According to historical records, we have one man to thank for this: Edwin Hubble.