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.

Nov 29, 2025 · 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 …

May 7, 2025 · Explore a curated collection of resources about Mercury. These resources include activities that can be done at home, as well as videos and animations, images, and printable graphics.

3 days ago · Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission arriving in 2026 might solve the mystery.

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 …

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.

Mar 27, 2025 · Mercury is the smallest and innermost planet in the solar System, named after the Roman god Mercurius and known for its proximity to the Sun, extreme temperatures, and cratered …

Dec 24, 2025 · 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.

Mercury's eccentric orbit and wide-ranging temperatures make it a world of extremes. Explore facts about our solar system's fastest and often elusive planet.

Mar 26, 2024 · Get facts about the planet Mercury. Learn about its orbit, temperature extremes, and atmosphere. Discover whether life on Mercury is likely.