Hubble Space Telescope
Hubble Space Telescope - Facts & Figures
NASA named the world's first space-based optical telescope after American astronomer Edwin P. Hubble (1889–1953). Dr. Hubble confirmed an "expanding" universe, which provided the foundation for the Big Bang theory. Hubble's two mirrors were ground so that they do not deviate from a perfect curve by more than 1/800,000ths of an inch.