A complete trip of a planet around the sun

The spinning of a planet on an axis

The sun and the many objects in space that move around the sun

A day during which the sun's direct rays point toward one of the tropics

All the matter and energy that exists

The elliptical path that a body takes as it travels around another body in space

The spiral galaxy in which our solar system is found

A rocky body that moves through space and is smaller than an asteroid

A force of attraction between objects that is due to their masses and distances between the objects

A huge cluster of gas, dust, and billions of stars

A day during which the sun's direct rays point to the equator

A nearly spherical object that orbits the sun but does not have its own orbit and is not a moon

The theory that a single deity created the universe from nothing

The theory that everything in the universe was once packed together in an extremely small, hot, dense ball of energy and something happened to cause it to cool and expand

A small body of ice, rock, and dust that orbits the sun in an elongated elipse; tail extends away from the sun

A group of stars connected in a recognizable pattern

An imaginary line through a planet on which a planet rotates

A small, rocky object that orbits the sun