Terrestrial Planets

The rocky inner planets of the Solar System, Mercury, Venus, Earth and Mars, which have solid surfaces and are counted from the Sun outward as the first to fourth planets. A planet belongs here when its cited article places it as one of the first four planets from the Sun. Members are placed here from their own cited Wikipedia articles, each with a verbatim supporting quotation, so a reader can check why an entry sits in this group. The grouping forms part of the browse path for this section of the atlas.