Across
- 2. A group of millions or billions of stars
- 4. A ball of gas that releases light and heat
- 5. A representation of an idea, object or system
- 6. An imaginary line through an object around which it spins
- 7. An imaginary line halfway between the North and South Poles
- 10. A planet made up mostly of rock and metal
- 12. The Sun and all the objects that orbit around it
- 13. The phase when the sunlit side of the Moon is facing away from Earth
- 15. An event where one object in space blocks another from view
Down
- 1. An object that orbits a planet or star and is not human-made
- 3. A large space rock that orbits the Sun
- 8. An attractive force between any two objects that have mass
- 9. The time it takes a planet to rotate once
- 11. time of year with typical weather patterns and daylight hours
- 14. The shape of the sunlit side of the Moon as seen from Earth