Solar System
The overall structure of the charted regions of the Solar System consists of the Sun, four relatively small inner planets surrounded by a belt of mostly rocky asteroids, and four giant planets surrounded by the Kuiper belt of mostly icy objects. Astronomers sometimes informally divide this structure into separate regions. The inner Solar System includes the four terrestrial planets and the asteroid belt. The outer Solar System is beyond the asteroids, including the four giant planets. Since the discovery of the Kuiper belt, the outermost parts of the Solar System are considered a distinct region consisting of the objects beyond Neptune.
Family Portrait (MESSENGER)
The Solar System Family Portrait is an image of many of the Solar System's planets and moons acquired by "MESSENGER" during November 2010 from approximately the orbit of Mercury. The mosaic is intended to be complementary to the "Voyager 1"s "Family Portrait" acquired from the outer edge of the Solar System on February 14, 1990.