Unit 6 Universe

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Across
  1. 5. a diagram that shows the relationship between the brightness, surface temperature, and color of stars
  2. 6. total amount of light (energy) emitted by a star or other celestial body
  3. 8. a scientific theory concerning the early development and shape of the universe from a dense state, which began and is still expanding
  4. 10. the measure of the observed visible brightness of a star
Down
  1. 1. the galaxy which contains our Sun and its solar system, including Earth
  2. 2. a region in space where gravity is so strong that even light cannot escape
  3. 3. observations of galaxies moving away from each other and our own Milky Way galaxy
  4. 4. clouds of dust and gas; site of star formation; remains of dead or dying stars
  5. 7. luminous globe of gas which produces its own heat and light by nuclear reaction made of mostly hydrogen and helium gas
  6. 9. a system of stars and associated matter heled together by gravitational attraction