SIX planets will align in the evening sky this week in a rare cosmic phenomenon you’ll be able to see with your own eyes. Mercury, Venus, Neptune, Saturn, Uranus, and Jupiter will all appear ...

New observations of Ganymede reveal a striking similarity between the auroras on the largest moon in the solar system and those on Earth. The international team of astrophysicists, led by researchers ...

The moon and Pleiades will glow together on Feb. 23 in a striking skywatching display.

Satellite spies stunning auroras from orbit during G1 geomagnetic storm.

Blizzards are a real-life example of what game theorists call the “snowdrift problem,” a cousin of the prisoner’s dilemma ...

Most of the rocks that fall from the heavens are tiny, ending up as meteors or fireballs, burning brightly in the sky in a more or less continuous fall. More serious objects are r ...