Observing the Universe

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Across
  1. 2. an astronomical body orbiting a star or stellar remnant.
  2. 5. the spatial period of a periodic wave.
  3. 6. use a convex lens to concentrate.
  4. 7. the close star to earth.
  5. 10. the entire range of radiant energy.
  6. 11. an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation.
  7. 12. a group of galaxy.
  8. 13. an instrument located in outer space to observe distant planets, galaxies and other astronomical objects.
  9. 15. the act of interfering, invading, or poaching.
Down
  1. 1. collect visible light waves.
  2. 3. use a curved mirror to concentrate.
  3. 4. all what in space.
  4. 8. type of astronomical object consisting of a luminous spheroid of plasma.
  5. 9. the alteration of the original shape of something.
  6. 14. quantitative property that must be transferred to an object.