Astronomy Vocabulary

3. A chunk of rock or dust in space
5. the partial or total blocking of one object by another
8. the amount of matter in a given amount of space
9. a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
10. mass divided by volume
11. the force that attracts a body toward another body with mass
13. a meteoroid that has hit Earth's surface
14. an imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates
16. a natural or artificial body that revolves around a planet
20. rotation the clockwise spin of a planet or moon as seen from above the planet's North Pole
22. the study of the universe
23. the motion of a body that travels around another body in space; one complete trip along an orbit

1. A description of the solar system in which all of the planets revolve around the sun.
2. a ball of ice and dust whose orbit is usually a long, narrow ellipse
4. the physical material that makes up an object
6. objects revolving around the sun that are too small and too numerous to be considered planets
7. An object's resistance to changes in speed or direction, unless acted on by an unbalanced force
12. the amount of space an object takes up
13. the amount of matter in an object
15. Eclipse occurs when the moon comes between Earth and the sun and the shadow of the moon falls on part of Earth
17. Eclipse occurs when Earth comes between the sun and the moon and the shadow of Earth falls on the moon
18. the spin of a body on its axis
19. A description of the solar system in which all of the planets revolve around the Earth.
21. a giant structure that contains hundreds of billions of stars