Mercury

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These are organized by a classification scheme developed exclusively for Cosma. More…

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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Encyclopedia

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.

  • 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. […]

  • 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. […]


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.

  • Arianespace and ESA announce Jupiter Icy Moons...
    on June 19, 2019 at 1:13 pm

    JUICE is the first large-class mission in ESA's Cosmic Vision 2015–2025 programme. Its mission is devoted to complete a unique tour of the Jupiter system. […]

  • Scientists find sun's history buried in moon's...
    on June 17, 2019 at 8:45 pm

    The Sun is why we're here. It's also why Martians or Venusians are not. […]

  • Image: Instant space selfies
    on June 17, 2019 at 1:22 pm

    How many times have you taken a selfie and posted it instantly to your favourite social media channel? The Mercury Transfer Module of the BepiColombo spacecraft, currently en route to Mercury, is equipped with three 'selfie-cams' and this morning captured a series of snapshots and subsequently posted them to its Twitter account. […]

  • New era for New Norcia deep space antenna
    on June 5, 2019 at 12:22 pm

    The 35-m deep space antenna in New Norcia, Western Australia, is being looked after by a new team, led for the first time by a female site manager, Suzy Jackson. […]

  • A brief history of Ariane 5 launches with science...
    on June 4, 2019 at 12:36 pm

    If it wasn't for launch capabilities we would never have delved deep into the echo of the Big Bang nor lived out the adventures of Rosetta and Philae at Comet 67P/Churyumov-Gerasimenko. Nor would we have captured some of the Universe's most energetic phenomena, or be on our way to the innermost planet of the solar system. Some of ESA's biggest science missions only got off the ground—literally—thanks to the mighty Ariane 5, one of the most reliable launchers that gives access to […]