The Sun and Stars Crossword

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Across
  1. 2. a place in space where gravity pulls so much that even light cannot get out.
  2. 5. stars with diameters bigger than the orbit of Mars.
  3. 8. Stars that are bigger than the giant stars.
  4. 10. neutron stars that emit radio waves in pulses due to their spinning motions.
  5. 11. used in astronomy to investigate and measure the spectra produced by matter interacting with or emitting electromagnetic radiation.
  6. 13. star’s brightness as seen from Earth.
  7. 15. the amount of light a star radiates
  8. 16. true brightness no matter it's distance from Earth.
Down
  1. 1. the temperature at or near the surface of an object
  2. 3. massive clouds of dust and gas in space.
  3. 4. The smallest known stars.
  4. 6. Sun is classified as a _________ dwarf star, though it is bigger than the size of a white dwarf star.
  5. 7. a powerful explosion resulting from nuclear fusion stopping in a supergiant star.
  6. 9. stars which are 1000 times bigger than sun.
  7. 10. a massive swirling cloud in the earliest stage of a star’s life.
  8. 12. diagram shows the relationship between surface temperature and absolute brightness of stars.
  9. 14. a _______ dwarf is a star that has a diameter that is almost similar to the size of Earth.