The planets are visible throughout February, "but they’ll be lined up best toward the end of the month,” NASA says.

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many surprises. That caricature is now collapsing. New analysis of NASA’s MESSENGER ...

Mercury, the smallest planet in the solar system, holds an outsized secret that some researchers believe could reshape how ...

Six Planet Parade: For those hoping for a dramatic celestial alignment, the six planet parade offers a subtle rather than spectacular show. With clear skies and timely viewing, this weekend provides ...

Six planets are above the horizon this weekend — but only two are obvious to the naked eye. Here’s what you’ll really see after sunset and when to look.

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Mercury, Venus, Jupiter, and Saturn—will be visible to the naked eye. Uranus and Neptune, being much farther away, will ...

Mercury has a very diverse surface, with some areas boasting young-looking terrain and others that are heavily cratered, but scientists couldn't explain why the planet's surface had such stark ...