Mercury

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General

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Solar System Exploration: Mercury (NASA)
Mercury Portal (Wikipedia)

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Mercury : the planet nearest the sun — Webster

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Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits. Mercury is bright when viewed from Earth, ranging from −2.3 to 5.7 in apparent magnitude, but is not easily seen as its greatest angular separation from the Sun is only 28.3°. Since Mercury is normally lost in the glare of the Sun, unless there is a solar eclipse it can be viewed from Earth’s Northern Hemisphere only in morning or evening twilight, while its extreme elongations occur in declinations south of the celestial equator, such that it can be seen at favorable apparitions from moderate latitudes in the Southern Hemisphere in a fully dark sky. — Wikipedia

Mercury (Eric Weisstein’s World of Astronomy, Wolfram Research)
Encyclopædia Britannica

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Spacecraft Crashes into Mercury at Insane Speed (Nadia Drake, National Geographic)
Messenger’s final image before crashing into the surface of Mercury (Michelle Starr, CNET)

MESSENGER Mission (NASA)
MESSENGER Mission (NASA)

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Mercury News -- ScienceDaily Planet Mercury News. Read science articles and see images of Mercury.

  • Scientists carry out first space-based...
    on June 11, 2020 at 10:39 pm

    Scientists have found a way of measuring neutron lifetime from space for the first time -- a discovery that could teach us more about the early universe.

  • Mercury's scorching daytime heat may help it make...
    on March 13, 2020 at 7:53 pm

    Despite Mercury's 400-degree Celsius daytime heat, there is ice at its caps. And now a study shows how that Vulcan scorch probably helps the planet closest to the sun make some of that ice.

  • Mercury has a solid inner core: New evidence
    on April 17, 2019 at 5:00 pm

    Scientists have long known that Earth and Mercury have metallic cores. Like Earth, Mercury's outer core is composed of liquid metal, but there have only been hints that Mercury's innermost core is solid. Now, in a new study, scientists report evidence that Mercury's inner core is indeed solid and that it is very nearly the same size as Earth's solid inner core.

  • The true power of the solar wind
    on June 12, 2018 at 2:57 pm

    The planets and moons of our solar system are continuously being bombarded by particles from the sun. On the Moon or on Mercury, the uppermost layer of rock is gradually eroded by the impact of sun particles. New results show that previous models of this process are incomplete. The effects of solar wind bombardment are much more drastic than previously thought.

  • Mercury's thin, dense crust
    on April 27, 2018 at 2:03 pm

    A planetary scientist has used careful mathematical calculations to determine the density of Mercury's crust, which is thinner than anyone thought.


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Super-Earths discovered orbiting nearby red dwarf
    on June 25, 2020 at 6:00 pm

    The nearest exoplanets to us provide the best opportunities for detailed study, including searching for evidence of life outside the solar system. In research led by the University of Göttingen, the RedDots team of astronomers has detected a system of super-Earth planets orbiting the nearby star Gliese 887, the brightest red dwarf star in the sky. Super-Earths are planets which have a mass higher than the Earth's but substantially below those of our local ice giants, Uranus and Neptune. […]

  • Human-derived mercury shown to pollute the...
    on June 22, 2020 at 10:00 pm

    Scientists have found that man-made mercury pollution has reached the bottom of the deepest part of the ocean—the Marianas Trench. This has significant implications for how mercury affects the marine environment, and how it may be concentrated in the food chain. The findings, which come from two independent research groups, are presented at the Goldschmidt geochemistry conference.

  • Solar Orbiter makes first close approach to the...
    on June 16, 2020 at 1:10 pm

    ESA's sun-exploring mission Solar Orbiter has made its first close approach to the star on June 15, getting as close as 77 million kilometers to its surface, about half the distance between the sun and Earth.

  • While stargazing on Mars, Curiosity rover spots...
    on June 15, 2020 at 7:28 pm

    NASA's Curiosity Mars rover occasionally stops to stargaze. Recently, it captured a shot of Earth and Venus in the Red Planet's night sky.

  • Scientists carry out first space-based...
    on June 11, 2020 at 7:49 pm

    Scientists have found a way of measuring neutron lifetime from space for the first time—a discovery that could teach us more about the early universe.