Скачать или смотреть Teach Astronomy - Hubble

http://www.teachastronomy.com/
Edwin Hubble was highly accomplished. A boxer, a Rhodes Scholar, a lawyer, all before turning his attention to astronomy. He joined the Mount Wilson Observatory just before the first World War where he was able to use their new hundred-inch telescope, the Hooker reflector, then the world's largest. Hubble's two main achievements in his career were monumental. First he demonstrated that many of the nebulae were distant systems of stars remote from the Milky Way galaxy. At a stroke he expanded the size of the known universe by a factor of hundreds. Second, he established that galaxies had redshifts that indicated the universal expansion, and this fact leads to the idea of the big bang model of the universe. The premier research facility in astronomy, the Hubble Space Telescope, is named after him.