Across
- 3. model where the Earth was center
- 5. an object moves in a straight line unless another force acts upon it
- 6. all known objects in space
- 9. fusion of hydrogen atoms to create helium atoms in a star
- 10. model where the sun in the center
- 14. large heavenly bodies that revolve around a star
- 15. An explanation of the world around us
- 18. distance light travels in one year
- 19. our galaxy, where our solar system is found
Down
- 1. object with strong gravity, nothing escapes
- 2. a system with a sun at the center and planets and other objects in space
- 4. distance in relation to a specific point of reference
- 7. position of an object in relation to an identified/specific point
- 8. brilliant explosion occuring from a dying supergiant star
- 11. initial explosion that resulted in formation and expansion of the universe
- 12. of attraction that governs how objects in space interact with each other
- 13. grouping of stars that form a pinwheel with arms spiraling from the center
- 16. a natural body that revolves around a planet, also known as the moon
- 17. large cloud of gas and dust with immense volume