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Across 1. layer of the sun's atmosphere above the photosphere 4. center of the sun 5. dark, cool areas of the sun's surface 7. outer layer of a star blown off in an explosion 10. large, bright stars that are fairly cool 12. very large stars 13. eruptions of electrically charged particles from the surface of the sun

Down 2. stars that fall within a band in the middle of the H-R diagram 3. layer of the sun's atmosphere 6. outer layer of a massive star that is blown apart in a violent explosion 8. very small, hot stars 9. streams of gases that shoot high above the sun's surface 11. outer layer of the sun's atmosphere