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Mercury is the smallest and innermost planet in the Solar System, with a highly elliptical orbit and a large iron core. Learn about its physical characteristics, orbit, rotation, surface features, atmosphere, history of observation, and exploration by space probes.
The astrological symbol for the planet became one of the alchemical symbols for the metal, and Mercury became an alternative name for the metal. Mercury is the only metal for which the alchemical planetary name survives, as it was decided it was preferable to quicksilver as a chemical name. [27] [28]
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Learn about Mercury, the smallest and fastest planet in our solar system, and its surface, atmosphere, and history of exploration. See images of Mercury from NASA missions and other sources.
Sep 21, 2024 · 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 see with the unaided eye. Because its rising or setting is always within about two hours of the Sun’s, Mercury is never observable when the sky is fully dark.
- Clark R. Chapman
Learn about Mercury, the innermost and smallest planet in our solar system, and its extreme temperatures, orbit, surface, and magnetosphere. Find out why Mercury is named after the Roman god of speed and why it has no moons or rings.
Oct 19, 2018 · Learn about the smallest and fastest planet in our solar system, its surface features, orbit, and missions. Find out how Mercury's proximity to the sun affects its temperature, craters, and retrograde motion.