CNN.COM - NASA released on Wednesday more of the first images of Mercury taken by a spacecraft orbiting the planet, including the first color closeups depicting it in all its pock-marked glory. The ...

Far smaller and closer to the Sun than it should be, Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission arriving in 2026 might ...

It’s a world where the Sun stops in the sky at noon and spins a small circle. Where you’d celebrate your annual birthday twice every day. In places, it’s as cold as the temperature of liquid air; ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. David Rothery, Professor of Planetary Geosciences, ...

Mercury, the speedy little planet closest to the sun, is making a special twilight appearance this month as a bright pink dot low in the sky. The show started on Feb. 8 and will continue until Feb. 21 ...

Mercury is a cold and desolate planet that appears to have little surface, no sign of water, and little atmosphere that can be observed. Wikimedia Commons A European-Japanese space mission will reach ...