Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea, says Abigail Beall ...

A new AI model from the University of Bern predicts planetary systems likely to host Earth-like planets. It could boost the ...

Combining with one other previously confirmed planet, one of our closest stellar neighbors now has a family of four.

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

A team of scientists want to start a new mission to try to find life beyond Earth and the solar system. Astronomers from ETH Zurich, a Swiss university, want to send four space telescopes to explore ...

A new model has been developed to simulate interstellar activity within our solar system and the nearby Alpha Centauri system ...

Astronomers have confirmed the existence of four rocky planets orbiting Barnard’s Star, our nearest solitary stellar neighbor just six light-years away. Using ultra-sensitive instruments, scientists ...

ANDREWS REPLIES: To answer Scott: If Planet Nine is discovered, I’m confident a probe would eventually be sent to it! But after launch it might take decades for a spacecraft to reach that destination, ...

The Trappist-1 system, just 40 light years from Earth, contains 7 rocky planets—all roughly the size of Earth. Packed tightly within the space between Mercury and the Sun, three of these planets lie ...