Mercury (planet) - Wikipedia
Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars.
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 …
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 …
Mercury Facts | Mercury Size | Mercury Planet Color | How Big ...
Dec 24, 2025 · Explore the closest planet to the Sun! Find out how long a day on Mercury is and how many moons the planet has. Also, keep up with the upcoming Mercury events!
10 Facts About Mercury, the Smallest Planet | Almanac.com
Nov 13, 2025 · Mercury has been a cooled molten rock for billions of years, and it is the only planet in our Solar System that is bare rock. Planet Mercury is named after the Roman god …
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.
Planet Mercury: Facts and Visibility
Mercury is the closest planet to the Sun, and the smallest planet in the solar system. It has a large iron core that accounts for about three-quarters of its mass.