What is the difference between a moon and a planet? Trick question! According to scientific definitions, there often isn’t much of a difference at all. That might seem counterintuitive, but it’s true.

Not all of Saturn’s moons are visible in space; however, some can be bright enough to be traced by a reliable telescope from ...

The Jovian moons Io and Europa will throw their shadows over Jupiter's cloud surface in the early hours of Nov. 5. Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see ...

Small icy moons may have hidden oceans that briefly boil under thick ice. Changing pressure inside these moons shapes their ...

Researchers at UC Santa Barbara, The University of Texas at Austin, Yale University and National Taiwan Normal University have found that a fair number of sun-like stars emerge with their rotational ...