Earth Space Honors Semester 2 Vocabulary

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Across
  1. 3. a collection of stars that make a picture used to map the night sky
  2. 6. the only EM wave that humans can see
  3. 7. the Sun's visible layer
  4. 8. theory that explains the formation of the universe
  5. 9. phase of the moon in which the entire lit side is facing Earth
  6. 10. ______ magnitude is the how bright a star appears from Earth
  7. 12. model of the solar system that places Earth in the center
  8. 15. the change in wavelength based on the motion of an object relative to the position of the observer is called the ____ effect
  9. 16. model of the solar system that places the sun in the center
  10. 18. theory that explains the formation of the solar system
  11. 20. super dense star that forms when a massive star dies
  12. 21. a collection of billions of stars held together by gravity
  13. 22. relatively cool area on the surface of the sun
  14. 23. EM waves are these types of waves
  15. 25. force of attraction in the universe
Down
  1. 1. calculated as mass divided by volume
  2. 2. anything that has mass and takes up space
  3. 4. ______ magnitude is how bright a star actually is
  4. 5. measurement of distance based on the distance that light can travel in a year in the vacuum of space
  5. 8. forms when a massive star dies; intense gravity that not even light can escape
  6. 11. created the three laws of planetary motion
  7. 13. where nuclear fusion occurs in the sun
  8. 14. classification of stars in which most stars are found
  9. 17. element that forms in the cores of massive stars causing fusion to stop
  10. 19. EM wave with the highest energy
  11. 24. EM wave with the longest wavelength