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Learn about the smallest planet in our solar system, its structure, surface, temperature, spin, and history. See stunning images of Mercury's craters, sunrise, and exosphere from NASA's spacecraft and explore more facts and games.
23 de abr. de 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
- How big is Mercury?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...
- Why is it difficult to observe Mercury?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...
- How far is Mercury from the Sun?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)....
- How hot and cold does Mercury get?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...
- Which moons in the solar system are larger than Mercury?Ganymede, a moon of Jupiter, and Titan, a moon of Saturn, are both larger than Mercury, the smallest major planet.
Há 3 dias · 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.
- 47.36 km/s
- 58.646 d, 1407.5 h
- 10.892 km/h (3.026 m/s)
- trace (≲ 0.5 nPa)
16 de abr. de 2024 · Dorling Kindersley via Getty Images. Mercury may be small, but it’s hefty. Although its diameter is barely larger than the moon’s, Mercury is over four times as massive as Earth’s natural...
28 de abr. de 2024 · Interesting Facts. 01 Number of Moons: None. 02 Color: Dark gray. 03 Surface: Rocky surface, covered with a thick layer of dust. 04 Atmosphere: Composed of hydrogen, helium and oxygen. 05 Temperature: 801 Fahrenheit. 06 Made of: 70% of the planet is made of iron. 07 Distance from Sun: 43.5 million miles.
Há 6 dias · On May 9, at 19:43 GMT (3:43 p.m. EDT), Mercury (mag. 0.4) will appear farthest from the Sun in the sky: the apparent distance between the two bodies will be 26°24'. As the innermost planet, most of the time, Mercury is near the Sun and, therefore, hard to observe.
17 de abr. de 2024 · The Seven Most Amazing Discoveries About Mercury | RealClearScience. Shi En Kim Smithsonian April 17, 2024. NASA, Johns Hopkins University Applied Physics Laboratory, Carne. It seems like Mercury, sitting so close to the sun, should already be a dead planet.
