Lesson 5: Stars and Galaxies Vocabulary

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Across
  1. 2. the outer layers of a star
  2. 4. range of wavelengths that stars emit
  3. 6. a large could of gas and dust
  4. 9. a region of a neutron star that is so dense nothing can escape from it; not even light
  5. 10. the core of a collapsed star
  6. 11. when the interior of a star collapses
  7. 12. the measure of the amount of light that is received on Earth.
  8. 14. an instrument that can spread the light into different wavelengths
  9. 15. a massive group of single stars, star systems, star clusters, dust, and gas bound by gravity.
  10. 16. the explosion of a star collapsing
  11. 18. active, young galaxies with black holes at their center
Down
  1. 1. the distance light travels in one year.
  2. 3. a galaxy that has no regular shape and are generally bright, young stars.
  3. 5. the theory that suggests the universe probably began about 13.7 billion years ago with an enormous explosion.
  4. 7. patterns of stars in the night sky.
  5. 8. a type of galaxy that is in the shape of round or flattened balls and contains only old stars.
  6. 13. measures the amount of light a star gives off
  7. 17. a type of galaxy that has a bulge in the middle and arms that spiral outward like the Milky