Planets orbiting two suns are rare. Scientists now understand why. Subtle gravitational forces, amplified by Einstein's relativity, destabilize planetary orbits over eons. This leads to planets being ...

Sixty-six light-years away, an Earth-sized exoplanet completes an orbit in under six hours, skimming around its star at ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

A duo of researchers has just published a study featured on the cover of the journal Astronomy & Astrophysics which shows that as it gets closer to the planet Mars, Phobos, its largest moon, ...

NASA scientists believe they’ve identified a kind of 'space battery' inside Earth’s magnetic shield, the same system that protects our planet from the Sun’s charged particles. So you might well have ...