In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and planetary masses silently orbit their stars—sometimes thousands of astronomical ...

There's so little we know about circumbinary planets—planets that orbit two stars instead of one—that they can feel like the stuff of fantasy. And for good reason: to date, we've only confirmed the ...

For a very long time, it was thought that the planets in our solar system represented the basic model of the universe. Rocky planets were found near the Sun, followed by gas giants further out from ...