The solar system could be packed with 1 million alien visitors, space rocks shaken away from our cosmic neighbor Alpha Centauri, new research has revealed. Skip to main content.

Our Solar System is full of mysteries, but if the inner planets are a puzzle, the boundary between the Solar System and interstellar space is a secondhand puzzle with half the pieces missing.

Astronomers have discovered that Saturn has thrown a newly found comet on its way out of the solar system. Comet A117uUD is expected to go interstellar at 6,700 mph.

NARRATOR: Our solar system is home to eight planets, near-perfect spheres spinning through the darkness of space. But the more we explore, the more weird and wonderful worlds we discover.

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, speeding through our celestial neighborhood.

Meet the surprising, oddball worlds moving around our solar system. From meteorites that impact Earth, to a moon that orbits backwards, to an imposter lurking in the asteroid belt, a variety of ...