Mercury

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Introduction1

Dictionary

Mercury : the planet nearest the sun — Webster

OneLook, Free Dictionary, Wiktionary

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

Portal

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

Search

WolframAlpha

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Preservation

History

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)

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

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Participation

Education

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

Course

Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources

Community

News

Science Daily, Phys.org

Book

ISBNdb

Government

Document

USA.gov

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More News …

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

  • Why does Mercury have such a big iron core?
    on July 2, 2021 at 7:43 pm

    A new study disputes the prevailing hypothesis on why Mercury has a big core relative to its mantle. For decades, scientists argued that hit-and-run collisions blew away much of Mercury's rocky mantle and left the big, dense, metal core inside. But new research reveals that collisions are not to blame -- instead, the density, mass and iron content of a rocky planet's core is influenced by its distance from the sun's magnetic field.

  • Cosmic diamonds formed during gigantic planetary...
    on September 29, 2020 at 4:34 pm

    Geoscientists have found the largest extraterrestrial diamonds ever discovered - a few tenths of a millimeter in size nevertheless - inside meteorites. Together with an international team of researchers, they have now been able to prove that these diamonds formed in the early period of our solar system when minor planets collided together or with large asteroids. These new data disprove the theory that they originated deep inside planets - similar to diamonds formed on Earth - at least the size […]

  • 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.


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.

  • Last nine years all among 10 hottest-ever, says US
    on January 15, 2022 at 4:00 pm

    The nine years spanning 2013-2021 all rank among the 10 hottest on record, according to an annual report a US agency released Thursday, the latest data underscoring the global climate crisis.

  • Earth's interior is cooling faster than expected
    on January 14, 2022 at 1:20 pm

    Researchers at ETH Zurich have demonstrated in the lab how well a mineral common at the boundary between the Earth's core and mantle conducts heat. This leads them to suspect that the Earth's heat may dissipate sooner than previously thought.

  • New insights into seasons on a planet outside our...
    on January 13, 2022 at 5:27 pm

    Imagine being in a place where the winds are so strong that they move at the speed of sound. That's just one aspect of the atmosphere on XO-3b, one of a class of exoplanets (planets outside our solar system), known as hot Jupiters. The eccentric orbit of the planet also leads to seasonal variations hundreds of times stronger than what we experience on Earth. In a recent paper, a McGill-led research team, provides new insight into what seasons looks like on a planet outside our solar system. The […]

  • Scientists use Summit supercomputer, deep...
    on January 11, 2022 at 2:34 pm

    A team of scientists led by the Department of Energy's Oak Ridge National Laboratory and the Georgia Institute of Technology is using supercomputing and revolutionary deep learning tools to predict the structures and roles of thousands of proteins with unknown functions.

  • Cosmic history can explain the properties of...
    on December 30, 2021 at 1:45 pm

    Astronomers have managed to link the properties of the inner planets of our solar system with our cosmic history: with the emergence of ring structures in the swirling disk of gas and dust in which these planets were formed. The rings are associated with basic physical properties such as the transition from an outer region where ice can form where water can only exist as water vapor. The astronomers made use of a spread of simulation to explore different possibilities of inner planet evolution. […]

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Related

Here are links to pages about closely related subjects.

Knowledge Realm

Physical

“Fundamentals”
Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle

“Space”
Universe (Astronomical Instrument)
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Our Neighborhood
Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

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Notes

1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.