Astronomy Vocabulary - Extra Credit

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Across
  1. 4. Most stars, including our sun, are this type of star
  2. 7. Shape of our orbit and all planets' orbits
  3. 8. This can be created from the death of the most massive stars
  4. 10. The force of attraction between two objects with mass
  5. 11. This is a rotating neutron star
  6. 13. This place on the EM spectrum is less energetic than red but more energetic than microwaves
  7. 15. This place on the EM spectrum has a shorter wavelength than violet but longer than X-rays
  8. 16. This is the measure of how round or linear an ellipse or orbit is
  9. 18. This is a star explosion
  10. 19. A solar system has one star, but a _____ will have billions of stars
  11. 20. This star is hotter than our sun but dimmer
  12. 23. The moon and GPS are examples of these
  13. 24. Besides elliptical and spiral, galaxies are sometimes classified as this shape, especially in the early universe
  14. 25. When space objects move away from us, they "shift" their spectrums this way
Down
  1. 1. One of the 'center' points of an ellipse
  2. 2. How the sun powers itself
  3. 3. The earth-centered model of the solar system
  4. 5. Astronomers use "OBAFGKM" to sort stars by this property
  5. 6. The sun-centered model of the solar system
  6. 9. The start of our universe
  7. 12. This is the particle form of light
  8. 14. The negatively charged particle inside of an atom
  9. 17. This star is cooler than our sun but brighter
  10. 21. Space object 100-1000s of km in diameter orbiting in a belt
  11. 22. Both absorption and emission spectra are also classified as these type of spectra