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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.
The following outline is provided as an overview of and topical guide to Mercury: Mercury – smallest and innermost planet in the Solar System. Its orbital period (about 88 Earth days) is less than any other planet in the Solar System. Seen from Earth, it appears to move around its orbit in about 116 days. It has no known natural satellites.
Caravaggio is an example of a Peak ring impact basin on Mercury. Several areas on Mercury are extremely dark, such as a small crater within Hemingway crater in the lower right. The geology of Mercury is the scientific study of the surface, crust, and interior of the planet Mercury. It emphasizes the composition, structure, history, and physical ...
Mercury, being the closest to the Sun, with a weak magnetic field and the smallest mass of the recognized terrestrial planets, has a very tenuous and highly variable atmosphere (surface-bound exosphere) containing hydrogen, helium, oxygen, sodium, calcium, potassium and water vapor, with a combined pressure level of about 10 −14 bar (1 nPa). [2]
List of geological features on Mercury is an itemization of mountains, valleys, craters and other landform features of the planet Mercury.Different types of features are named after different things: Mercurian ridges are called dorsa, and are named after astronomers who made detailed studies of the planet; valleys are called valles, and are named after ancient abandoned cities, towns, and ...
Mercury is a chemical element; it has symbol Hg and atomic number 80. It is also known as quicksilver and was formerly named hydrargyrum (/ h a ...
Mercury features in the first published comic book story of Jack Kirby, Mercury in the 20th Century, published in Red Raven Comics 1, 1940. [ 19 ] The United States' so-called Mercury dime , issued from 1916 to 1945, actually features a Winged Liberty and not the god Mercury, but despite wearing a Phrygian cap instead of a winged helm, the coin ...
Mercurian: 414 craters (7.9%) Lunar: 1,624 craters (31.1%) Martian: 1,092 craters (20.9%) Venusian: 900 craters (17.2%) Others: 1,198 craters (22.9%) Distribution of named craters in the Solar System as of 2017 [a] This is a list of named craters on Mercury, the innermost planet of the Solar System (for other features, see list of geological features on Mercury). Most Mercurian craters are ...