Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant ...

The hunt for Planet Nine continues as new discoveries make the Solar System’s biggest mystery even harder to solve. Is there ...

New work offers fresh evidence supporting the supernova shock wave theory of our solar system’s origin. According to one longstanding theory, our Solar System’s formation was triggered by a shock wave ...

Jupiter is the largest planet in our solar system (so large, in fact, that some scientists think it might have even consumed other worlds), a gas giant so massive that it shaped the orbits and ...

"Proceedings of the NATO Advanced Study Institute on Planets Outside the Solar System: Theory and Observations, Cargèse, Corsica, France, May 5-15, 1998"--T.p. verso. "Published in cooperation with ...

A provocative latest essay by Harvard astrophysicist Avi Loeb has reignited debate over whether interstellar objects passing through our solar system could carry more than just dust and ice. In his ...