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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All About Mercury (Space Place, NASA)
Mercury (Cosmos4Kids)

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

  • 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. […]

  • Meteorite diamonds tell of a lost planet
    on April 18, 2018 at 6:48 pm

    Scientists have examined a slice from a meteorite that contains large diamonds formed at high pressure. The study shows that the parent body from which the meteorite came was a planetary embryo of a size between Mercury and Mars. […]

  • Understanding Mercury's magnetic tail
    on April 17, 2018 at 3:57 pm

    Theoretical physicists used simulations to explain the unusual readings collected in 2009 by the Mercury Surface, Space Environment, Geochemistry, and Ranging mission. The origin of energetic electrons detected in Mercury's magnetic tail has puzzled scientists. This new study provides a possible solution to how these energetic electrons form. […]

  • What the first American astronauts taught us...
    on March 27, 2018 at 6:17 pm

    Project Mercury proved that humans could live and work in space, paving the way for all future human exploration. […]


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.

  • BepiColombo monitoring camera test image
    on October 15, 2018 at 2:07 pm

    An unusual view of part of the BepiColombo spacecraft stack, taken by one of the monitoring cameras (or 'selfie-cams') fixed to the Mercury Transfer Module, MTM. The camera is looking up towards the solar array drive (top left) and the back side of the solar array closest to the 'body' of the spacecraft module. The image was taken in late September as part of launch preparations at Europe's Spaceport in Kourou, French Guiana. […]

  • Giant planets around young star raise questions...
    on October 15, 2018 at 1:43 pm

    Researchers have identified a young star with four Jupiter and Saturn-sized planets in orbit around it, the first time that so many massive planets have been detected in such a young system. The system has also set a new record for the most extreme range of orbits yet observed: the outermost planet is more than a thousand times further from the star than the innermost one, which raises interesting questions about how such a system might have formed. […]

  • Five in a row—the planets align in the night sky
    on October 12, 2018 at 12:05 pm

    For the second time this year, the five brightest planets can be seen at the same time. You can catch them by looking towards the western sky after sunset. The planets will form a line rising up from the horizon. […]

  • Video: BepiColombo mission to Mercury
    on October 10, 2018 at 1:07 pm

    BepiColombo is scheduled for launch at 01:45 GMT (03:45 CEST) on 20 October on an Ariane 5 from Europe's Spaceport in Kourou. […]

  • Mercury and its depressions
    on September 19, 2018 at 1:41 pm

    One of the most surprising discoveries of the NASA's Messenger mission was the presence of unusual, bright, irregular and rimless flat-floored depressions on the surface of Mercury. These depressions, called hollows, are usually found on crater walls, rims, floors and central peaks. […]