| plan | an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome |
|---|---|
| plan | a building housing an instrument for projecting the positions of the planets onto a domed ceiling |
| plan | involving the entire earth |
| plan | having no fixed course |
| plan | of or relating to or resembling the physical or orbital characteristics of a planet or the planets |
| plan | of or relating to or characteristic of the planet Earth or its inhabitants |
| plan | an outer gear that revolves about a central sun gear of an epicyclic train |
| plan | (astrology) one of 12 equal areas into which the zodiac is divided |
| plan | a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star |
| plan | one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system |
| plan | the theory that the solar system was formed by the gravitational accumulation of planetesimals |
| plan | any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter) |