A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

In April, astronomers said they had detected a possible signature of life on the exoplanet K2-18b. Now, three independent ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

A conversation with Peter Schlosser, vice president and vice provost of Global Futures at Arizona State University ...