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Mantle

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Two Fragments of Protoplanet Theia Lie Deep within Earth, Geoscientists Say

Two Fragments of Protoplanet Theia Lie Deep within Earth, Geoscientists Say

Posted by By Enrico de Lazaro November 1, 2023
A giant collision between the ancient protoplanet Theia and the proto-Earth about 4.5 billion years ago may have formed Earth’s Moon as well as two continent-sized regions — formally known…
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InSight Finds Evidence for Molten Silicate Layer above Martian Metallic Core

InSight Finds Evidence for Molten Silicate Layer above Martian Metallic Core

Posted by By News Staff October 25, 2023
Mars’ liquid iron alloy core is surrounded by a layer of fully molten silicate (magma) about 150 km thick, according to a pair of papers published in the journal Nature.…
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Planetary Scientists Find Evidence for Active Mantle Plume on Mars

Planetary Scientists Find Evidence for Active Mantle Plume on Mars

Posted by By News Staff December 6, 2022
Elysium Planitia, a flat-smooth plain just north of the Martian equator, is underlain by an 4,000-km-diameter active mantle plume, according to new research by scientists from the Lunar and Planetary…
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AstronomyPlanetary Science

Astronomers Propose New Definition of Planet

Established in 2006 by the International Astronomical Union, the current definition specifies that to qualify as a planet, a celestial ...
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Planetary ScienceSpace Exploration

Cassini Reveals Surface Properties of Titan’s Hydrocarbon Seas

Saturn’s moon Titan was explored by NASA’s Cassini spacecraft from 2004 to 2017. While Cassini revealed a lot about this ...
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