any object that orbits another larger body in space
satellite
an apparent change in the Moon's shape
phase
a hollow area in the ground
crater
the Sun and all the objects that orbit the Sun
solar system
any of the nine large bodies that orbit the Sun. In order from the Sun outward, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto
planet
a huge, hot sphere of gases, like that Sun, that gives off its own light
star
a tool that gathers light to make faraway objects appear closer
telescope
a curved piece of glass (an object that transmits and refracts light)