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 Hubble Space Telescope "opened a new window to the universe" when it launched into space. Now, 35 years later, NASA is ...

The James Webb Space Telescope continues to amaze - not just by what it sees, but by what it doesn’t. Its latest focus is NGC 346, a star cluster in the Small Magellanic Cloud, 210,000 light-years ...