Explore the stars

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Across
  1. 2. Huge clouds of gas or dust in deep space
  2. 6. a group of stars that look like a figure of a hunter with belt and sword
  3. 8. a sudden temporary outburst of energy from a small area of the sun's surface
  4. 10. natural bodies visible in the sky especially at night that give off light or shine by reflection
  5. 13. the northern group of stars that is the easiest to pick out, is located near the north pole of the heavens, and contains the stars forming the Big Dipper two of which are in a line pointing in the direction of the North Star. Also called the Great Bear.
  6. 14. a jet engine that operates like a firework but carries its own oxygen for burning as the fuel
  7. 15. one of the halves of the earth as divided by the equator or by a meridian
  8. 16. the outermost part of the atmosphere of a star (like the sun)
  9. 17. a tube-shaped instrument for viewing distant objects (as objects in outer space)
  10. 20. a meteor that reaches the surface of the earth
Down
  1. 1. a northern group of stars in a straight line south of Cassiopeia between Pegasus and Perseus
  2. 3. the group of stars that includes the north pole of the heavens and the stars which form the Little Dipper with the North Star at the tip of the handle. Also called the Little Bear.
  3. 4. a northern group of stars between Andromeda and Cepheus
  4. 5. one of the very large groups of stars and other matter that are found throughout the universe
  5. 7. A small body of matter in the solar system that is observable when it falls into the earth's atmosphere. When it enters the atmosphere, the friction may cause it to glow brightly for a short time.
  6. 9. the science of the heavenly bodies and of their sizes, motions, and composition
  7. 11. one of the dark spots that appear from time to time on the sun's surface and are usually visible only through a telescope
  8. 12. a heavenly body orbiting another of larger size. Or, a man-made object that orbits the earth, the moon, or another heavenly body
  9. 18. a heavenly body other than a comet, asteroid, or satellite that travels in orbit around the sun
  10. 19. the earth's natural satellite that shines by reflecting light from the sun and revolves about the earth in about 29½ days