Chapter 8-1

A large object that orbits a star.

• moon

• planet

• comet

• star

a natural object that orbits a planet.

• planet

• star

• moon

• satellite

a natural or artificial object in space that circles around another object.

• satellite

• galaxy

• comet

• moon

a mixture of ice, frozen gases, rock, and dust that orbits the sun.

• galaxy

• moon

• star

• comet

an object in space that produces its own energy including heat and light

• moon

• star

• galaxy

• comet

a collection of billions of stars

• comet

• satellite

• galaxy

• planet

the path one object travels around another object

• gravity

• inertia

• revolution

• orbit

the tendency of a moving object to keep moving in a straight line or of any object to resist a change in motion.

• gravity

• rotation

• inertia

• revolution

one complete trip of one object around another object

• revolution

• rotation

• orbit

• gravity

a complete spin on an axis

• revolution

• rotation

• orbit

• inertia