Across
- 3. A ball of ice and dust whose orbit is usually a long narrow eclipse
- 7. The region of the solar system between the orbits of Mars and Jupiter where asteroids are found.
- 10. A scientist who studies the universe beyond Earth
- 13. The name given to the first outer planets.
- 15. A description of the solar system in which all of the planets revolve the sun.
- 16. A chunk of rock or dust in space
Down
- 1. A description of the solar system in which all of the planets revolve around Earth.
- 2. The spinning motion of a planet from east to west
- 4. The attractive force between two objects; its magnitude depends on their masses and the distance between them.
- 5. Any object that revolves around another object space (Moon)
- 6. A streak of light in the sky produced by the burning of meteoroid in
- 8. Objects that revolve around the sun that are too small and too numerous to be considered planets.
- 9. Fusion The combining of two atomic nuclei onto a single larger nucleus
- 10. The study of the moon, stars, and other objects in space
- 11. The name given to the four inner planets.
- 12. The path of an object as it revolves around another object in space
- 14. A systems of millions or billions of stars held together by gravitational attraction