| __ | 1. | Celestial Body | | A. | all matter and energy that exists |
| __ | 2. | Galaxy | | B. | sphere of gas with nuclear reactions at its core |
| __ | 3. | Gravity | | C. | spherical object that orbits a planet |
| __ | 4. | Moon | | D. | large cloud of gas and dust where stars are formed |
| __ | 5. | Nebula | | E. | the force that holds celestial bodies in a circular orbit |
| __ | 6. | Planet | | F. | system of planets and smaller objects orbiting the sun |
| __ | 7. | Solar System | | G. | billions of stars and planets held together by gravity |
| __ | 8. | Star | | H. | rocky, spherical object that orbits a star |
| __ | 9. | Sun | | I. | any object located in space (ex: planet, moon, star, comet) |
| __ | 10. | Universe | | J. | closest, medium-sized star to Earth |