Mercury

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

General

Portal

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

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

Introduction

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WolframAlpha

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

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Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources

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Science Daily, Phys.org

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USA.gov

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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.

  • Blue Origin's first crewed flight minted four new...
    on July 20, 2021 at 2:54 pm

    The world's richest man Jeff Bezos, his brother, a Dutch teenager who is now the youngest ever astronaut and a barrier-breaking female US aviator who is now the oldest have now been to space.

  • Amazon magnate Bezos ready to ride his own rocket...
    on July 20, 2021 at 7:37 am

    The wealthiest man on the planet Jeff Bezos will ride his own rocket to outer space on Tuesday, a key moment for a fledgling industry seeking to make the final frontier accessible to elite tourists.

  • Who's who on Blue Origin's first crewed flight
    on July 18, 2021 at 7:37 pm

    Blue Origin's maiden crewed flight on Tuesday involves four people who will cross the Karman line, which separates Earth's atmosphere from space, for the very first time.

  • EXPLAINER: How Blue Origin's Jeff Bezos will soar...
    on July 18, 2021 at 7:02 pm

    When Blue Origin launches people into space for the first time, founder Jeff Bezos will be on board. No test pilots or flight engineers for Tuesday's debut flight from West Texas, just Bezos, his brother, an 82-year-old aviation pioneer and a teenage tourist.

  • 18-year-old joining Blue Origin's 1st passenger...
    on July 15, 2021 at 3:18 pm

    An 18-year-old is about to become the youngest person in space, rocketing away with an aviation pioneer who will become the oldest at age 82.