Astronomy

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Across
  1. 2. how bright an object appears on Earth
  2. 4. a dying star in the final stage
  3. 6. the stellar core left after a dying star
  4. 7. small, rocky object that orbits the sun
  5. 10. complete range of all types of radiation
  6. 14. rotating neutron stars
  7. 16. forms when a massive star runs out of fuel
  8. 17. the brightest star in the sky
  9. 18. a group of stars that make a shape
  10. 19. graph of stars plotted
  11. 21. gaseous cloud made up of the Sun and planets formed by condensation
  12. 22. how much matter something contains
  13. 23. the apparent magnitude of an object
  14. 24. difference in apparent object seen in two different points
  15. 25. force in planets that draw them together
Down
  1. 1. supermassive black hole
  2. 3. a property of matter that stays at rest
  3. 5. when two stars orbit around a common centre of mass
  4. 8. small body of mass in the solar system
  5. 9. a cloud of gas and dust to make a star
  6. 11. the explosion of a star
  7. 12. a place in space where gravity pulls so much
  8. 13. a union by melting
  9. 15. rotating disk
  10. 20. frozen snowball of gases, rock, and orbit