STARS, GALAXIES, BLACK HOLES

12345678910111213141516171819
Across
  1. 4. the band of colors produced when white light passes through a prism
  2. 8. a rapidly spinning neutron star that emits rapid pulses of radio and optical energy
  3. 9. the brightness of a star as seen from Earth
  4. 11. a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
  5. 12. a tight group of stars that looks like a ball and contains up to 1 million stars
  6. 14. a large, reddish star late in its life cycle
  7. 17. an object so massive and dense that even light cannot escape its gravity
  8. 19. a large cloud of gas and dust in interstellar space; a region in space where stars are born or where stars explode at the end of their lives
Down
  1. 1. the brightness that a star would have at a distance of 32.6 light-years from Earth
  2. 2. the theory that states that the universe began with a tremendous explosion about 13.7 billion years ago
  3. 3. Hertzsprung-Russell diagram, a graph that shows the relationship between a star’s surface temperature and absolute magnitude
  4. 4. a gigantic explosion in which a massive star collapses and throws its outer layers into space
  5. 5. the study of the origin, properties, processes, and evolution of the universe
  6. 6. an apparent shift in position of an object when viewed from different locations
  7. 7. a group of stars that are close together relative to surrounding stars
  8. 10. the location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right to the upper left
  9. 13. a very luminous, starlike object that generates energy at a high rate; quasars are thought to be the most distant objects in the universe
  10. 15. a collection of stars, dust, and gas bound together by gravity (pg. 596)
  11. 16. a small, hot, dim star that is the leftover center of an old star
  12. 18. the distance that light travels in one year