"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring ...

Far beyond the bright planets, in the dim outskirts of the Solar System, astronomers keep stumbling on objects that refuse to follow the rules. Around Neptune in particular, a handful of newly charted ...

Earth and its neighbors orbit the sun on a relatively flat plane. But what's below this plane, and is anythign below the ...

(CNN) — After decades of searching, astronomers have uncovered some of the strongest evidence yet of exoplanets orbiting Barnard’s Star, the nearest single star system to Earth. The four planets are ...

NASA’s newly launched IMAP mission is set to tell us more about the boundary between our Solar System and interstellar space ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Morgan Underwood, Rice University (THE CONVERSATION) When astronomers search for ...