Mercury | Facts, Color, Size, & Symbol | Britannica
2024年12月21日 · Mercury has a radius of about 2,440 km, and its surface area is 74,797,000 km. Its mass is 3.30 × 10 kg. Mercury is the smallest major planet in both size and mass. Why is it difficult to observe Mercury?
Mercury Facts - Science@NASA
2017年10月16日 · The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter.
Mercury (planet) - Wikipedia
Mercury is one of four terrestrial planets in the Solar System, which means it is a rocky body like Earth. It is the smallest planet in the Solar System, with an equatorial radius of 2,439.7 kilometres (1,516.0 mi). [4] . Mercury is also smaller —albeit more massive—than the largest natural satellites in the Solar System, Ganymede and Titan.
How Big is Mercury? The Size Is Changing and Here's Why | Space
2020年10月6日 · Mercury's diameter is 3,030 miles (4,878 km), comparable to the size of the continental United States. This makes it about two-fifths the size of Earth. It is smaller than Jupiter's moon...
Mercury: Size, distance from the Sun, orbit | Astronomy.com
2023年10月20日 · Size: Mercury is about 3,032 miles (4,880 kilometers) across. That makes it the smallest planet in the solar system. In fact, Mercury is just a little larger than Earth’s Moon.
Mercury - NASA Science
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.
What Is the Planet Mercury?(Grades 5-8) - NASA
2011年3月30日 · Mercury is the smallest and fastest planet in the solar system. It is also the closest planet to the sun. It is named after the Roman messenger god Mercury, the fastest Roman god. The planet Mercury was known by ancient people thousands of years ago. It has no moons.
Facts About Mercury | Closest Planet to The Sun - Star Walk
2024年12月20日 · 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. To give you a better understanding of Mercury’s size, let’s say …
Mercury - Innermost Planet, Smallest, Hot | Britannica
2024年12月21日 · With a radius of about 2,440 km (1,516 miles), Mercury is the smallest major planet, smaller even than Jupiter’s largest moon, Ganymede, or Saturn’s largest moon, Titan. In addition, Mercury is unusually dense.
Mercury planet - Canadian Space Agency
Mercury is the closest planet to the Sun, which likely influenced its composition and formation. The planet has a surprisingly large iron core, which may have formed because the early Sun heated and vaporized rock on Mercury's surface.