From July 3 through July 8, it will be possible to sight the two largest objects currently in orbit around the Earth, passing ...

The newest visitor is 416 million miles (670 million kilometers) from the sun, out near Jupiter. NASA said the comet will ...

Comet or asteroid heading for the Sun is only the third time an interstellar object has been spotted inside our group of ...

EXCLUSIVE: Scientists say the discovery of a Jupiter-like planet promises to further understanding of planetary systems.

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.