Billions of years from now, the Sun will swell into a red giant, swallowing Mercury, Venus, and Earth. But that’s not the ...

A paper by astronomers Nathan Kaib and Sean Raymond released earlier this month used new simulations to determine how likely ...

A passing star has been discovered that could cause chaos in the Solar System, sending Earth flying out of orbit.

Mercury, for instance, is already the wild card of the inner planets. Its orbit grows more eccentric over time, increasing ...

A series of studies have cast doubt on the sensational claim that "the strongest evidence yet" was found that life exists ...

The lone planet confirmed to be in the system is squeezed in between the two, orbiting at a distance similar to Earth's ...

Astronomers discover more than 100 hidden black holes in a star cluster, revealing surprising movements in ancient galactic ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.