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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.
A heavy, silvery d-block element, mercury is the only metallic element that is known to be liquid at standard temperature and pressure; [ a ] the only other element that is liquid under these conditions is the halogen bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature. [ b ]
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 bears his name due to resemblance. [20] The United States E-6B aircraft flown by the United States Navy is a communications platform named after ...
Mary Wallace Funk (born February 1, 1939) is an American aviator, commercial astronaut, [1] [2] and Goodwill Ambassador.She was the first female air safety investigator for the National Transportation Safety Board, the first female civilian flight instructor at Fort Sill, Oklahoma, and the first female Federal Aviation Agency inspector, as well as one of the Mercury 13.
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 ...
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 processes that shape the planet. It is analogous to the field of terrestrial geology. In planetary science, the term geology is used in its broadest sense to mean the study of ...
Interesting facts shown as lightbulbs on post-it notes. Like Dr. Seuss once said, “There are so many things you can learn about, but you’ll miss the best things if you keep your eyes shut ...
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 ...