With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

NASA’s Kepler mission has verified 1,284 new planets – the single largest finding of planets to date. “This announcement more than doubles the number of confirmed planets from Kepler,” said Ellen ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet between the ...

It is a question that feels like it should have a straightforward answer: how many planets are there in our solar system? Since Pluto was relegated back down to dwarf planet status, almost everyone ...

Sky gazers across the U.S. will have a chance to see an extraordinary celestial event on Friday as all of the planets in our solar system will appear in the evening sky. This phenomenon known as a ...

We can expect some stunning celestial events in 2025, including the Jan. 13 Wolf Moon and a remarkable planetary parade, where seven planets will align in the night sky, that starts tonight. A parade ...