Across
- 4. first planet from the sun
- 7. the abbreviation for this is AU
- 9. fifth planet from the sun
- 10. Mercury, Venus, Earth, and Mars are all classified as these planets
- 12. this is a small body of ice, rock or dust in space
- 14. this is the force of attraction between objects due to their masses
- 16. No longer considered a planet, but it used to be our ninth planet.
- 17. sixth planet from the sun
- 19. this is the term used to describe the apparent shift in position of an object when it is viewed from different places
- 20. seventh planet from the sun
- 23. this is the shape of the galaxy where we live
- 25. this is an instrument used to collect and concentrate light from distant objects to make them more visible
Down
- 1. this is space and all of the energy and matter in it
- 2. this terms is the path that a particular object follows as it travels around another body in space
- 3. second planet from the sun
- 5. third planet from the sun
- 6. this scientist came up with three laws of motion of objects on Earth and in space
- 8. this is the distance that light travels in a vacuum in one year
- 11. eighth planet from the sun
- 13. this is the name of a small, rocky or metallic body that may be debris left over from when the solar system was formed
- 15. Jupiter, Saturn, Uranus, and Neptune are all classified as these planets
- 18. fourth planet from the sun
- 21. this is the name of the closest star to us
- 22. this is the name of the galaxy we live in
- 24. this is a small, irregularly shaped rocky and metallic body that usually orbit the sun in the asteroid belt