1 a small body from wich a planet oringinated in the early stages of development of the solar system.
2 a telescope that uses a set of lenses to gather and focus light from distant objects
3 the time required for a body to complete a single orbit
4 the spin of a body on its axis
5 any of the primary bodies that orbit the sun; a similar body orbits another star
6 all of the frequencies or wavelengths of elctromagnetic radiation
7 the moment when the sun appears to cross the clestial equator
8 a telescope that uses a curved mirror to gather and focus light from distant objects
9 the motion of a body that travels around another body in space; one complete trip along an orbit
