Mercury has always been a bit of an oddball planet. With about half the mass of Mars but roughly the size of the Moon, and a ...

Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why ...

NASA is asking for the public's help, but there's a catch. Mercury's surface is seen in exaggerated color in this image provided by NASA. NASA/JHU APL/CIW — -- NASA is asking for the public's ...

As the planet closest to the Sun, Mercury has it rough. Not only is it the smallest planet in our solar system, but Mercury's crust is also fractured and sheared in several places. There are also ...

Close-up images from NASA’s MESSENGER spacecraft revealed that Mercury’s surface records impacts of almost unimaginable scale. Bright ray systems radiate from certain craters, stretching hundreds and ...