Astronomy Vocabulary

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Across
  1. 4. planets similar to Jupiter, large gas and low density
  2. 5. the cloud of gas and dust that stars form in
  3. 7. a spherical object that orbits a star
  4. 10. a collection of gravitationally bound stars
  5. 13. when a star moves away from us its wavelengths will get longer
  6. 14. the type of star that the sun will turn into next
  7. 16. a measurement of a stars brightness
  8. 18. the type of electromagnetic radiation with the shortest wavelength
  9. 20. when a star moves towards us its wavelengths will get shorter
  10. 21. a change in wavelength caused by movement
  11. 22. everything known to exist
  12. 23. a model of the solar system with the earth at the center
Down
  1. 1. gas and dust combine together into larger pieces
  2. 2. one of the white dwarf stars
  3. 3. the theory that the universe began from a single point 13.7 billion years ago
  4. 6. the planet with the highest density
  5. 8. planets similar to the earth, small rocky and dense
  6. 9. the type of electromagnetic radiation with the longest wavelength
  7. 11. hydrogen molecules combine to make helium and release energy
  8. 12. the planet with the longest day
  9. 15. the galaxy we live in
  10. 17. a model of the solar system with the sun at the center
  11. 19. young average sized stars