Mercury Size:36" x 36" (91 cm x 91 cm) Chandra's X-rays detect gas that

Chandra's X-rays detect gas that has been heated to millions of degrees by stellar winds and supernovas

among many others

Hold up a grain of sand at arm's length to the night sky on a clear night and you'll get some sense of the tiny area used for this very first image

a brightness surge that is visible on Saturn's rings when the sun is directly behind the spacecraft

Image scale is 28 miles (44 kilometers) per pixel

Mercury Size:36" x 36" (91 cm x 91 cm) Chandra's X-rays detect gas thatThis colorful view of Mercury was produced by using images from the color base map imaging campaign during MESSENGER's primary mission. These colors are not what Mercury would look like to the human eye, but rather the colors enhance the chemical, mineralogical, and physical differences between the rocks that make up Mercury's surface.