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Learn about Mercury, the smallest and closest planet to the Sun, with no moons or rings. Find out about its craters, core, temperature, rotation, orbit, and more.
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 , 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.
May 19, 2024 · 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.
- Clark R. Chapman
- Mercury has a radius of about 2,440 km, and its surface area is 74,797,000 km2. Its mass is 3.30 × 1023 kg. Mercury is the smallest major planet in...
- Mercury is the smallest planet in the solar system, and it is also the planet closest to the Sun, making it the most difficult of the planets to se...
- Mercury's average orbital distance from the Sun is 58 million km (36 million miles) and it has the shortest year (a revolution period of 88 days)....
- Two locations on Mercury’s equator are called hot poles, and surface temperatures there can exceed 700 kelvins (K; 800 °F, 430 °C). Surface tempera...
- Ganymede, a moon of Jupiter, and Titan, a moon of Saturn, are both larger than Mercury, the smallest major planet.
Learn about Mercury's namesake, size, orbit, rotation, surface, atmosphere, and magnetosphere. Find out why Mercury is the hottest and coldest planet, and how it differs from Earth and other terrestrial planets.
Learn about Mercury, the smallest and fastest planet in our solar system, and its surface, atmosphere, moons, and more. See images, stories, and pop culture references to Mercury from NASA and other sources.
May 6, 2024 · Learn about Mercury, the smallest and fastest planet in our solar system. Find out how it looks, how it spins, what it is made of, and why it is so extreme.
Oct 19, 2018 · Learn about the smallest, fastest, and most elusive planet in our solar system. Find out how Mercury was formed, what its surface looks like, and what missions have explored it.
