Across
- 2. is the unit of measurement equal to earths average distance from the sun
- 6. is a model of the solar system with planets revolving around the earth
- 8. is a model of the solar system with the sun in the middle
- 10. is the third stage of a large/massive star
- 11. is the force that pulls objects toward each other
- 12. is an explosion of a dying supergiant star
- 14. is the movement of an object around another object
- 16. is the first stage of any star
- 18. spinning motion of planets
- 20. Bang is the theory that states an explosion resulted into the creation of the universe
- 21. observed motion of planets for 20 years
- 24. is the tendency of an object to resist any change in its motion
Down
- 1. law is the law that states the farther away a galaxy is, the faster it is moving away
- 3. zone is the outermost layer of the sun’s interior
- 4. arranged planets around the sun
- 5. created 3 laws of planetary motion
- 7. is an imaginary pattern of stars in the sky
- 9. saw craters on the moon
- 13. created a model of the geocentric system
- 15. star is the small particle in the nucleus of the atom with no electrical charge
- 16. added epicycles to the geocentric
- 17. zone is the region of very tightly packed gases in the suns interior
- 19. sequence is the second stage of any star
- 22. dwarf is the fifth stage of a small/medium star.
- 23. hole is an object whose gravity is so strong that nothing can escape it