Puzzle 2

123456789101112131415161718
Across
  1. 3. breaks up starlight into a spectrum of color
  2. 5. A curve that represents the evolutionary positions of stars having the same age but differing masses
  3. 9. sunspots are formed here
  4. 11. chiron is a ...
  5. 12. minor planets
  6. 14. 206265 astronomical units
  7. 16. this indian astronomer calculated sidereal rotation of the earth accurately
  8. 17. A small, old, relatively cool star
  9. 18. brightest planet in the earth's night sky
Down
  1. 1. eruption of a flamelike tongue of relatively cool, high-density gas from the solar chromosphere into the corona
  2. 2. jupiter,saturn,uranus,neptune are which type of planets
  3. 4. twilight zone
  4. 6. Io is a ...
  5. 7. small, dense remains of a high-mass star after a supernova
  6. 8. A contracting cloud of gas and dust with enough mass to form a star
  7. 9. One of the small asteroid like bodies that formed the building blocks of the planets
  8. 10. path of the earth around the sun
  9. 13. it is formed when a star has lost its outer layers as a planetary nebula
  10. 15. The fuzzy outer layer of a comet