The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

The star is surrounded by a protoplanetary disk, and this disk is the first evidence of debris condensing into what will ...

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...

The bold question-askers at What If explore whether our Solar System could survive if it ended up orbiting a black hole.

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and meteoroids. The exact boundaries of the solar system ar ...

The Hubble Space Telescope has snapped some spooky looking photos of our solar system's newest interstellar invader on the ...

Students in AST 250/251 build sophisticated space physics instruments of their own design  — suiting in bunny suits, booties, ...

In a cosmic first, astronomers have spotted the earliest signs of rocky planet formation around a young star. The discovery ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | Harvard & Smithsonian said in a statement. "It shows that even very distant ...

THE mysterious interstellar object blazing through our solar system could be a piece of “possibly hostile” alien technology, ...

A fifth planet has been detected within the habitable zone of a neighboring star, where conditions could perhaps support ...