The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

When we first began searching for planets around other stars, one of the surprising discoveries was that there are planets orbiting white dwarfs. The first exoplanets we ever discovered were white ...

A planetary system anchored by a dead white dwarf star ... times that of Jupiter, the solar system's most massive planet. This object is likely to be a "brown dwarf," a body often referred ...

But the question remains as to whether a planet could retain a water-rich environment through the red giant stage of a star before it becomes a white dwarf ... Our own solar system, for example ...

Opinions expressed by Forbes Contributors are their own. Jamie Carter is an award-winning reporter who covers the night sky. Computer simulations suggest that there is an undiscovered Earth-like ...

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting ...