Vocabulary-Christian Holmes-4th

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Across
  1. 2. arms Areas of stars that spread out from the center of a spiral galaxy
  2. 6. The transfer of energy through matter or space as electromagnetic waves
  3. 7. of light How fast light travels
  4. 9. hole An object with more than four solar masses squeezed into a ball
  5. 10. A galaxy with a bright center and very little dust or gas
  6. 12. mass Used in astronomy as a standard unit to compare the size of other stars with our sun
Down
  1. 1. Electromagnetic waves with long wavelengths and low frequencies
  2. 2. The death of a large star by explosion
  3. 3. The luminous celestial body around which the earth and other planets revolves
  4. 4. A large grouping of stars in a space
  5. 5. Large cloud of gas and dust in interstellar space
  6. 7. A self-luminous celestial body consisting of a mass
  7. 8. All space and matter space contains
  8. 11. waves Electromagnetic wave with longer wavelengths than visible light