Across
- 1. a spectacular light show
- 3. a round ball shape is called a sphere
- 5. a measurement of time
- 7. a person who travels and works in space
- 10. are satellites of planets
- 11. the name given to a collision between two objects in space
Down
- 1. the layers of gases that surround many planets and other bodies
- 2. the force of attraction
- 4. a collection of billions of stars
- 6. our closest star
- 8. pieces of rock or metal that orbit the sun
- 9. known as snowballs of the solar system