Scientists have found ice on Mars. The frozen water, whose quantity may equal Lake Michigan, is within a meter of the surface.

New techniques give a better view of the sun, help predict flares, aurora and destruction from the sun. Like staying warm? Like radio? Love our sun!

New searches are finding lots of asteroids. None of them are aimed at us — yet. How much damage have asteroids done in the past?

The discovery of a planet that could resemble Jupiter in its size and orbit is focusing attention on this ageless question: are we alone in the universe?