stars

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Across
  1. 2. star, two gravitationally bound stars
  2. 5. cluster, group of gravitationally bound stars that have space between them
  3. 6. plane, group of gravitationally bound together
  4. 9. cluster, group of gravitationally bound stars that form a sphere-like shape
  5. 11. shift, how we tell if stars are binary
  6. 12. a group of stars that make a shape
  7. 13. 12 constellations alon the ecliptic plane
Down
  1. 1. orbit around something
  2. 2. shift, the lines on the spectrum toward a higher frequency
  3. 3. shift, when the spectral lines move toward a lower frequency
  4. 4. , half of the sphere
  5. 7. constellations, constellations that move around the pole
  6. 8. group of stars that are gravitationally bound together
  7. 10. lines, the lies on the spectrum that help determine elements, star speed and more