Mercury (planet) - Wikipedia
Mercury is a classical planet that has been observed and recognized throughout history as a planet (or wandering star). In English, it is named after the ancient Roman god Mercurius (Mercury), god of …
Mercury | Facts, Color, Size, & Symbol | Britannica
Jan 6, 2026 · Mercury, the innermost planet of the solar system and the eighth in size and mass. Its closeness to the Sun and its smallness make it the most elusive of the planets visible to the unaided …
Mercury - Science@NASA
May 7, 2025 · Mercury Facts Mercury is the smallest planet in our solar system and the nearest to the Sun. Mercury is only slightly larger than Earth's Moon. It's the fastest planet, zipping around the Sun …
Mercury - National Air and Space Museum
Mercury is the closest planet to the Sun. It is known as the Swift Planet because of how fast it travels through space—a whopping 29 miles per second (47 kilometers per second).
Mercury, world of extremes - The Planetary Society
Mercury is the smallest planet in the Solar System and the closest one to the Sun. It's also a little-explored world, full of mystery, with a surface split into extremes and an interior that puzzles …
Mercury facts | BBC Sky at Night Magazine
Jun 26, 2025 · Facts about the planet Mercury, including surface features, missions and the history of our relationship with the closest planet to the Sun.
Mercury Planet Facts - Science Notes and Projects
Mar 26, 2024 · Get facts about the planet Mercury. Learn about its orbit, temperature extremes, and atmosphere. Discover whether life on Mercury is likely.
All About Mercury | Fun Facts About Mercury | How Big Is Mercury Planet
Feb 4, 2026 · Mercury is the smallest planet in the Solar System in both mass and diameter. It’s 18 times less massive than the Earth, and its diameter barely reaches two-fifths of the Earth’s size.
NASA’s Mercury mission just revealed a discovery no one saw coming
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 ...
Mercury Facts - Interesting Facts about Planet Mercury
Mercury is the most cratered planet in the Solar System. Unlike many other planets which “self-heal” through natural geological processes, the surface of Mercury is covered in craters.