The curious minds at What If explore what would happen if Kepler 22-b suddenly appeared in our solar system, revealing the ...

AMES, Iowa – An international team of astronomers has used nearly three years of high precision data from NASA’s Kepler spacecraft to make the first observations of a planet outside our solar system ...

The Milky Way just got a lot more crowded — with planets. NASA on Tuesday announced 1,284 new planets orbiting stars outside our solar system, called exoplanets. That's on top of the approximately ...

When astronomers announced Kepler-452b, they were not just adding another distant world to a growing catalog. They were ...

Scientists have discovered a distant solar system very much like our own, in which the orbits of all known planets lie in nearly the same plane and are aligned with the star's rotation. In recent ...