Across
- 3. a force that pulls all matter.
- 7. suggested that the earth and the other planet moved around the sun.
- 8. the earth has a north and south.......
- 9. solar particles that come in contact with the earth magnetic field.
- 11. it is hotter in summer becuase the sun's rays are more........
- 12. one of Jupiter's moons.
- 14. the distance light travelled in 1 year.
- 15. an instrument used to find direction.
- 17. the name of our solar system.
- 18. in known as the center of our galaxy
- 19. the SI unit for a force.
Down
- 1. this happens when the sun moves across the sky.
- 2. anything that orbits a planet is called a ........
- 4. a squashed circle.
- 5. these are the paths planets and moons take around the sun.
- 6. The are only .............. planets in our solar system.
- 7. a pattern of stars.
- 10. .......... Centauri is our nearste star
- 13. The first space probe to reach the moon.
- 16. until 500yrs ago people believed it was flat.