When a white dwarf cools enough that it no longer gives off visible light, it becomes a black dwarf. ... but the Sun as a white dwarf will be about 200,000 times denser than our planet.

In the galaxy GSN 069, a star has survived a close encounter with a black hole, ending up in orbit around it. Material pulled off the star turned it from a red giant into a white dwarf, and in ...

The supermassive black hole didn't finish off its meal, which scientists say was either a huge Jupiter-like planet wandering freely through space or a brown dwarf, a strange object that's larger ...

A glimpse of our solar system’s future has appeared thousands of light-years away in the constellation Sagittarius. There a giant planet like Jupiter orbits a white dwarf, a dim, dense star that ...

Explore Black Holes and Destroy Planets in the Awesome New Interstellar Game. ... astronomers) decided it was now a just "dwarf planet"? Wait, not everyone did that? OK, that's cool.

If Earth manages to survive the Sun’s giant phase, it will find itself orbiting a hot white dwarf barely larger than our planet. For eons, Earth will continue to orbit the Sun.

Our Sun had a companion and there could be many undiscovered dwarf planets in the outer Solar System. That’s according to a new paper from scientists from Harvard University. Published today in ...

Someday, our sun will swell into a red giant and scorch everything in its path before collapsing into a white-hot dwarf star. In solar systems with stars like our own, this apocalypse tends to ...