Space

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Across
  1. 3. Device that uses a prism or diffraction grating to separate light into its component wavelengths.
  2. 7. It uses a convex lens to collect light and form an image.
  3. 9. Astronomers use these constellations to locate and name stars.
  4. 10. Large group of stars, gas, and dust held together by gravity.
Down
  1. 1. Collects amplifies radio waves.
  2. 2. Uses concave mirrors to gather light.
  3. 4. Giant star that has lost its outer layers, leaving behind a hot, dense core that continues to contract under gravity.
  4. 5. late stage in a star's life cycle when hydrogen fuel is depleted.
  5. 6. Light emits the surface of the sun.
  6. 8. a spiral galaxy that is about 100,000 light years in diameter.