The Solar System consists of the Sun and planets that orbit it. There are four inner planets closest to the Sun - Mercury, Venus, Earth, and Mars - and four outer planets farther away - Jupiter, Saturn, Uranus, and Neptune. The Moon is Earth's natural satellite, and it has four phases as it orbits Earth: full moon, first quarter moon, last quarter moon, and new moon. The document also discusses the atmosphere, hydrosphere, geosphere, maps, and geographic coordinates.