Movement in Space

5. a ball of hot gas that undergoes nuclear fusion
8. the movement of an object around another object
9. the tendency of an object to resist change in motion
10. term describing a model of the universe in which Earth is the center of the revolving planets and stars
12. a streak of light in the sky produced by the burning meteoroid in Earth's atmosphere
15. the path of an object as it revolves around another object in space
16. an object that orbits a star, is large enough to have become rounded by its own gravity and has cleared areas of orbit.
17. a loose collection of ice and dust that orbits the sun

1. a pattern or grouping of stars that people imagine to represent figure or object
2. term describing a model of the solar system where Earth and other planets revolve around the sun.
3. either of the two days of the year on which the sun reaches its greatest distance north or south of the equator
4. an object that orbits a planet
6. an imaginary line that passes through the planet's center, about which it rotates
7. the attractive force between objects
11. either of two days of the year on which neither hemisphere is tilted toward or away from the sun
13. the shape of the planets orbits
14. the spinning motion of a planet on its axis