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Across 6. When all of the mass of a star collapses to a poing that has no volume. 9. Cooler areas of the sun's atmosphere. 10. The cloud of dust and gas that is the beginning of a star. 11. Measure of the amount of light from a star that is recieved on earth 14. Largest layer of the sun's atmosphere 15. Patterns of star in the sky. 16. The stage of a star where only neutrons can exist. 17. The layer of the sun's atmosphere where light is given off. 18. Measure of the amount of light that a star gives off.

Down 1. Constellation in the northern shy that circle Polaris. 2. The apparent shift in the position of an object when it is viewed from diffrent places. 3. The stage of a star where the core has used upa the helium, leaving behind a hot, dense core. 4. The stage of a star where the outer layer expands and cools. 5. Distance that light travels in one year. 7. The universe with a enormous explosion and continues to expand. 8. The stage of a star where the core collapses violently and the other portions of the star explodes. 12. The stage of a star where the outer layer expands and cools. 13. The transition zone of the sun's atmosphere.