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