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 ...

Scientists have long wondered about how a planet as small as Mercury could have kept its iron core fluid enough to account for the planet's magnetic field. Physics would seem to dictate that the ...

Mercury's dense iron core - three quarters of its diameter - is due to the sun's magnetism and not collisions with other celestial bodies, according to a newly published study.

Mercury’s disproportionately massive core may be the result of the Sun’s powerful magnetic influence rather than the consequence of a cataclysmic collision with another body in the ancient ...

Mercury’s core may be wearing a metal jacket. New experiments suggest the planet’s innards stay warm thanks to an insulating layer of iron sulfide, which could help to explain how the small ...

Mercury is the closest planet to the sun and the smallest planet in the solar system. Here we explore the strange world in more detail.

Mercury, the closest planet to the Sun, is a world of blazing heat, freezing nights, and endless mysteries. Recent photos ...

This magnetic field, which pulled small iron grains inward, explains Mercury's big iron core and why Mars has so little iron in its core.

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 ...

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 ...