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The resonance makes a single solar day (the length between two meridian transits of the Sun) on Mercury last exactly two Mercury years, or about 176 Earth days. Mercury's orbit is inclined by 7 degrees to the plane of Earth's orbit (the ecliptic), the largest of all eight known solar planets.
Mercury formed about 4.5 billion years ago when gravity pulled swirling gas and dust together to form this small planet nearest the Sun. Like its fellow terrestrial planets, Mercury has a central core, a rocky mantle, and a solid crust.
Despite its proximity to the Sun, Mercury is not the hottest planet in our solar system— that title belongs to nearby Venus, thanks to its dense atmosphere. But Mercury is the fastest planet, zipping around the Sun every 88 Earth days. Mercury is appropriately named for the swiftest of the ancient Roman gods.
22 de jul. de 2023 · Mercury facts. Equator circumference: 15,329km. Radius: 2,440km. Average distance from Sun: 58 million km. Surface temperature: -180°C to 430°C. Day length: 59 Earth days. Year length: 88 Earth days. Average orbital speed: 170,500km/h (47km/s) Moons: 0. Planet type: terrestrial. How big is Mercury?
- Structure and Surface
- Time on Mercury
- Mercury’s Neighbors
- Quick History
Mercury is the smallest planet in our solar system.Mercury is a terrestrial planet. It is small and rocky.Mercury has a thin exosphere.Mercury’s surface can be as hot as 800 degrees F during the daytime and as cold as -300 degrees F during the nighttime. (But Mercury is not the hottest planet in the solar system. The hottest plane...A day on Mercury lasts 59 Earth days.A year on Mercury lasts 88 Earth days.Mercury does not have any moons.Mercury is the closest planet to the Sun.Venus is Mercury’s neighboring planet.Mercury has been known since ancient times because it can be seen without advanced telescopes.Because it is so close to the Sun, Mercury is hard to study from Earth. No people have ever gone to Mercury, but two robotic spacecraft have visited. The spacecraft were called Mariner 10 and MESSE...MESSENGER mapped Mercury by taking pictures of the planet's surface, including some areas that had not been seen before. It also collected information about what the surface and insides of Mercury...11 de jan. de 2024 · Mercury Observational Parameters Discoverer: Unknown Discovery Date: Prehistoric Distance from Earth Minimum (10 6 km) 77.3 Maximum (10 6 km) 221.9 Apparent diameter from Earth Maximum (seconds of arc) 13.0 Minimum (seconds of arc) 4.5 Maximum visual magnitude -2.43 Mean values at inferior conjunction with Earth Distance from Earth (10 6 km) 91.69 Apparent diameter (seconds of arc) 11.0
Basic astronomical data. 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.
