Mercury, the closest planet to the sun, is only slightly larger than Earth's moon and is pockmarked with craters. The planet is visible to the unaided eye and as such as has long been known to humans.

This is a photomosaic of images collected by Mariner 10 as it flew past Mercury. It shows the planet's southern hemisphere. The spacecraft took more than 7,000 images of Mercury, Venus, the Earth, and ...

Mercury is the closest planet to the sun, and you would be forgiven for thinking it’s just a boring lump of rock. After all, there’s nothing interesting on it like aliens or places to drink. Still, ...

We have just entered a very favorable period for observing the so-called "elusive" planet Mercury. From now, until about May 13, you should be able to find it with not much difficulty. But how well do ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. 1.) Over 3 billion people could experience it. Wherever the Sun is ...

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Rockets roared to life on August 3, 2004, as an intrepid spacecraft launched from Cape Canaveral and set out to uncover mysteries about the Solar System’s smallest planet: Mercury. The Messenger craft ...