269 Hits
jana harini
Aug 5, 2021, 2:32 AM
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.
Read More
