Space

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Across
  1. 5. Telescope that collects and magnifies radio waves.
  2. 6. Late stage in a star's life cycle that occurs when it's hydrogen fuel is depleted, it's core contracts, and it's outer layers expand and cool.
  3. 7. Giant star that lost its outer layers leaving behind a hot, dense core that continues to contract under gravity.
  4. 8. Optical instrument that use double convex lenses to collect light
  5. 9. Large group of stars, gas, and dust held together by gravity.
Down
  1. 1. light-emitting surface of the sun.
  2. 2. a spiral Galaxy that is about 100,000 light-years in diameter and contain from 200 to 400 billions star including the sun
  3. 3. Device that disperses light into its component wavelengths, using a prism or diffraction grating.
  4. 4. Star pattern that appears to form images,is used by astronomers to locate and name stars , and often is named for a mythological creature.
  5. 8. Optical instrument that uses a concave mirror to collect light and a lens to magnify an image.