Across
- 4. theory that the universe started as a tiny point and has been expanding ever since
- 6. feature of the sun
- 8. the last stage of our suns life cycle
- 10. galaxy galaxy with arms like a pinwheel
- 11. innermost layer of the sun
- 13. measurement that astronomers use when measuring distances in space
- 14. round or oval shape galaxy
- 15. the first stage of a star's life cycle
Down
- 1. center of our solar system
- 2. an object from space that lands on Earth's surface
- 3. outermost layer of the sun
- 5. galaxy with a featureless appearance
- 7. theory that the universe could stop expanding and collapse in on itself
- 9. galaxy with no clear shape
- 12. color of the sun when viewed from space