For the first time, NASA's Kepler spacecraft has found two Earth-size planets outside our solar system – a landmark achievement. But the planets are in a solar system that baffles scientists and could overthrow current models of planet formation.
Scientists say they've found two planets that survived being swallowed by a red-giant star. Earth won't be so fortunate when our sun becomes a red giant in 5 billion years, but the find shows what can happen to solar systems after such dramatic events.
Asteroid Vesta is currently in the asteroid belt between Mars and Jupiter. Scientists recently discovered a huge mountain on the asteroid Vesta.
Scientists with the Messenger mission to Mercury unveiled their findings Thursday, which are answering some decades-old mysteries – but also creating new ones.
Tatooine is the mythical home of Luke Skywalker. Now, scientists have identified a planet in a binary system 200 light-years away, although the planet is more like Saturn in mass and makeup.
Vesta, the second-largest object in the asteroid belt, may have a thin skin of water molecules like parts of the moon. Dawn, an orbiting spacecraft, arrives today to begin orbiting and observing.
The Space Shuttle Endeavour will be visible in the night sky early Tuesday morning. When can you see Endeavor, on it's last mission, and where should you look?
Beginning of the end of the world: May 21st is what a California minister (with a considerable following) predicts. Scientists, for their part, consider the sun's 'habitable zone' in calculating when Earth will become toast.