This illustration shows the average brown dwarf is much smaller than our sun and low mass stars and only slightly larger than the planet Jupiter. Disclaimer: AAAS and EurekAlert! are not ...

Astronomers have discovered that "super-Earth" planets may exist on wider orbits than previously thought — and this implies ...

A quartet of Earth-like worlds, each about 20% to 30% the size ... closest star to our solar system, after the three ...

Diminutive Barnard's Star is closer in size to Jupiter than to the ... of between two and seven Earth days (for comparison, ...

Astronomers have discovered the weirdest planetary system ever seen, consisting of a planet rolling around rare binary ...