The curious minds at What If explore how the discovery of Kepler 22-b in our solar system would alter everything we know about space and life.

Recent research suggested the first and only moons seen around planets outside the solar system didn't actually exist; now, the scientists who initially found them are back to defend their discovery.

Scientists analyzed famed astronomer Johannes Kepler’s 1607 sketches of sunspots to solve a mystery about the sun’s solar cycle that has persisted for centuries.

In the 17th century, German astronomer Johannes Kepler figured out the laws of motion that made it possible to accurately ...

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 ...

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 ...

NASA’s Kepler observatory should be able to detect planetary moons – yet to be discovered – formed by far-away planetary collisions outside our Solar System, research by Amy Barr of the ...

For astrobiologists, the search for life beyond our solar system could be likened to where one would look in a vast desert—essentially, where there's water. And it turns out that one of the most ...

Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

"Get a free What If Top 10 book when you sign up for our newsletter: Earth is the only life-supporting planet in our Solar System. Until now. Today Read Joe Biden doctor's full statement on ...