The smallest planet in our Solar System may be hiding a big secret. Curious bright streaks on Mercury's surface, doodled on ...

For many years, scientists viewed Mercury as a world that no longer had an active geological history. The planet appears to be almost completely uniform, dry, barren, and mostly unchanged for the past ...

Mercury has long been cast as the solar system’s burnout case, a small rocky world that cooled quickly and then froze in ...

An analysis of 100,000 satellite images of Mercury has revealed traces of changes that challenge the image of a "dead" planet.

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 ...

Io and its shadow are crossing in front Jupiter’s disk this morning, with Europa following later. Io’s shadow appears at the eastern limb just after midnight in the Eastern time zone — around 12:10 ...