Such are the strange semantic questions raised by studies of CD-35 2722 B, a brown dwarf with about 30 times the mass of ...

The Moon is often described as a pristine, silent world. No rain, no wind, no atmosphere to speak of. What that also means, in a very practical sense, is that nothing up there rusts, erodes, or gets ...

Astronomers discovered a moon-like object orbiting a brown dwarf that's orbiting a star. Say that three times fast.

A 300-foot-tall anomaly on one of Mars' moons has intrigued observers for years.