Mercury

A new study answers a longstanding mystery about why Mercury’s surface is darker than the Moon’s surface. This study implicates carbon as a “stealth” darkening agent.

Two new papers provide global-scale maps of Mercury’s surface chemistry that reveal previously unrecognized geochemical terranes — large regions that have compositions distinct from their surroundings.

Sean Solomon, former principal investigator for the NASA Astrobiology Institute team at the Carnegie Institution, has been selected to receive the National Medal of Science.

NASA's MESSENGER spacecraft has provided the first optical images of ice within permanently shadowed craters near Mercury's north pole.

Explosive volcanism on Mercury existed far more recently than scientists previously thought.

Life would have to adapt to strange light cycles, but photosynthesis might still be possible.

A new set of simulations showing how the Solar System formed reveals Mars is quite unlikely.

A new study on Mercury's magnetic field has revealed unexpected differences between the core of Mercury and the core of the Earth.

New simulations show that Mercury and other unusually metal-rich objects in the Solar System may be relics left behind by earlier hit and run collisions.

This 'soccer ball' is actually an old impact crater in Goethe Basin that has been flooded with volcanic lava flows, resulting in a 'ghost crater'.