Across
- 4. a star that is just forming
- 6. an orbital shape that is not a perfect circle
- 7. the largest planet in our solar system
- 8. the object at the center of our solar system
- 9. a measurement that depends on gravity
- 11. the scientist who studies the universe
Down
- 1. the force caused by mass and distance between two objects
- 2. a push or a pull
- 3. combination of a star(s), planets, and moons
- 4. a dwarf planet in our solar system
- 5. a unit of measurement (distance from earth to the sun)
- 10. a measurement that does not change based on gravity
- 12. the path an object takes around a star