Across
- 1. objects revolving around the sun that are too small and too numerous to be considered planets
- 3. the force that attracts a body toward another body with mass
- 4. the amount of space an object takes up
- 7. a ball of ice and dust whose orbit is usually a long, narrow ellipse
- 8. a giant structure that contains hundreds of billions of stars
- 9. the spin of a body on its axis
- 10. the amount of matter in an object
- 12. A description of the solar system in which all of the planets revolve around the sun.
- 14. a meteoroid that has hit Earth's surface
- 15. the amount of matter in a given amount of space
- 16. rotation the clockwise spin of a planet or moon as seen from above the planet's North Pole
- 18. an imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates
Down
- 1. the study of the universe
- 2. the physical material that makes up an object
- 5. A chunk of rock or dust in space
- 6. An object's resistance to changes in speed or direction, unless acted on by an unbalanced force
- 8. A description of the solar system in which all of the planets revolve around the Earth.
- 11. a natural or artificial body that revolves around a planet
- 13. a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
- 17. the motion of a body that travels around another body in space; one complete trip along an orbit