The sun's closest stellar neighbors are three stars in the Alpha Centauri system. The two main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair. The third star is Proxima Centauri.

Our solar system consists of an average star we call the Sun, the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and "Pluto". It includes: the satellites of the planets; numerous comets, asteroids, and meteoroids; and the interplanetary medium.