The Universe

1234567891011121314
Across
  1. 1. large celestial body that is composed of gas and emits light
  2. 5. system collection of large and small bodies that orbit our central star, the sun
  3. 6. a gigantic explosion in which a high-mass star throws its outer layers into space
  4. 8. a spherical body that orbits the sun
  5. 9. dwarf the hot, dense core of matter that remains after the collapse of a low mass star
  6. 11. star a small, incredibly dense ball of closely packed neutrons
  7. 13. a large cloud of gas and dust
  8. 14. the distance that light travels through space in 1 year
Down
  1. 2. magnitude measure of how bright a star would be from a standard distance
  2. 3. diagram a graph that illustrates the temperature and brightness of stars
  3. 4. the actual brightness of a star
  4. 7. magnitude measure of a star's brightness as seen from Earth
  5. 10. space and all of the matter and energy in it
  6. 12. large collection of stars, gas, and dust that is held together by gravity