Mercury is the first planet from the Sun and the smallest in the Solar System. In English, it is named after the ancient Roman god Mercurius (Mercury), god of commerce and communication, and the messenger of the gods. Mercury is classified as a terrestrial planet, with roughly the same surface gravity as Mars.

Jan 22, 2025 · 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 every 88 Earth days. Mercury is named for the swiftest of the ancient Roman gods. Get the Facts

Jan 17, 2025 · Mercury is the second densest planet, after Earth. It has a large metallic core with a radius of about 1,289 miles (2,074 kilometers), about 85% of the planet’s radius. There is evidence that it is partly molten or liquid.

5 days ago · 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 eye. Because its rising or setting is always within about two hours of the Sun’s, it is never observable when the sky is fully dark.

Jan 14, 2025 · Mercury is the smallest planet in our solar system. It’s just a little bigger than Earth’s Moon. Mercury itself, though, doesn’t have any moons. It is the closest planet to the Sun, but it’s actually not the hottest. Venus is hotter. Along with Venus, Earth, and Mars, Mercury is one of the rocky planets.

Oct 19, 2018 · Named for the fleet-footed Roman messenger god, Mercury is the closest planet to the sun, zipping around our parent star at an average of 36 million miles away. However, Mercury’s orbit is not...

Apr 25, 2023 · This site has facts, figures, images and links about the planet Mercury.

Jan 17, 2025 · Three spacecraft have explored Mercury. The first spacecraft sent to study Mercury. The first spacecraft to orbit Mercury. An international mission comprised of two spacecraft.

Jan 9, 2025 · Mercury is the closest planet to the Sun, and the smallest planet in our solar system - only slightly larger than Earth's Moon.

Jan 20, 2025 · Mercury is an extreme planet in several respects. Because of its nearness to the Sun —its average orbital distance is 58 million km (36 million miles)—it has the shortest year (a revolution period of 88 days) and receives the most intense solar radiation of all the planets.