SciTechDaily
By UNIVERSITY OF MARYLAND
JULY 3, 2021
New research from the University of Maryland shows that proximity to the sun’s magnetic field determines a planet’s interior composition.
A new study disputes the prevailing hypothesis on why Mercury has a big core relative to its mantle (the layer between a planet’s core and crust). For decades, scientists argued that hit-and-run collisions with other bodies during the formation of our solar system 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—the sun’s magnetism is.
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