Across
- 3. the only planet inhabited by robots
- 6. this planet appears to spin on its side and is very cold and windy
- 7. A group of millions or billions of stars.
- 8. the hottest planet in the solar system
- 10. A model of the solar system in which the Earth is at the center.
- 11. the largest planet in the solar system
- 12. the only planet inhabited by life
- 13. The motion of one object around another because of gravity.
- 15. A planet made up mostly of gases like hydrogen and helium.
- 16. A planet made up mostly of icy materials.
- 17. how much matter is in an object
- 19. the sixth planet from the Sun surrounded by rings of ice and rock
- 21. An attractive force between any two objects that have mass.
- 23. The Sun and all the objects that orbit around it.
- 24. A model of the solar system in which the Sun is at the center.
Down
- 1. a galaxy in which the solar system is located
- 2. Any object that orbits a planet or star.
- 4. the gravitational force exerted between the Earth and another object
- 5. A large space rock that orbits the Sun.
- 9. A planet made up of mostly rock and metal.
- 14. the first planet located by using math and the farthest away from the Sun
- 18. A ball of gas that releases light and heat.
- 20. located between Mars and Jupiter
- 22. the smallest planet in the solar system