Stars

1234567891011121314151617
Across
  1. 2. A star that has used up all its fuel
  2. 6. This has gravity so strong light can not escape
  3. 8. Radio waves pulsing from a neutron star
  4. 13. How we gain knowledge of the universe
  5. 15. Patterns in the stars
  6. 16. When a star uses all its hydrogen and now uses helium
  7. 17. Also called celestial latitude
Down
  1. 1. Measured in magnitudes
  2. 3. Explosion that leaves behind a white dwarf
  3. 4. Used for classification, based on temperature and size
  4. 5. Help us observe the universe
  5. 7. The distance light travels in a year or 31 trillion km
  6. 9. The main fuel for stars
  7. 10. Change in position of something due to change in viewing position
  8. 11. This is the nuclear reaction stars use to make energy
  9. 12. Measure of distance 3.2 light years
  10. 14. This is what causes the doppler effect