His 1936 book, The Realm of the Nebulae, remains a classic. Hubble's later years saw him work at the Palomar Observatory with the powerful Hale Telescope, but he conducted little new research ...

This article was originally featured on The Conversation.. A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American ...

One century after Edwin Hubble revealed his astonishing discovery of a cosmos beyond the Milky Way, the most precise measurements still can’t agree on how fast galaxies are moving.