NASA hasn't closed the door on the possibility — and the man in line to be the agency's next chief is a champion of the idea.

The world's most famous telescope is celebrating in style with new views of Mars, nebulas and a galaxy that reminds us of home.

For 35 years, the Hubble Space Telescope has taken photos of celestial objects across the universe. Look back at 10 photos taken by the telescope orbiting above Earth's surface.