The sun moon and the earths system.

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Across
  1. 2. the entire range of electromagnetic wavelengths that the sun emits
  2. 6. a small cool area on the suns photosphere
  3. 7. orbital motion around a point, such as the earth revolving around the sun.
  4. 9. the hot outer atmosphere of the sun that extends far out into space to become solar wind.
  5. 11. a stream of solar plasma that rises into the corona from the chromosphere and then gradually falls back
  6. 14. a sudden explosion of the plasma from the suns surface that emits a burst of energetic rays and particals into space
  7. 15. the lowest layer of the suns atmosphere starting at the photosphere and extending out to 2000 km from the surface.
Down
  1. 1. the suns output of protons, electron's, and small atomic nuclei into the solar system.
  2. 3. a long, narrow channel on a moon or planet that is believed to have originated from tectonic processes
  3. 4. the suns apparent path among the stars as observed from earth
  4. 5. a unit of astronomical distance equal to the earths average distance from the sun.
  5. 8. a broad lowland plane on the moon made of hardened lava
  6. 10. a nuclear reaction in which one large nucleus splits into smaller nuclei releasing large amounts of energy.
  7. 12. the visible surface around the sun.
  8. 13. a bright streak that radiates from some craters on the moons surface.