Space Vocabulary crossword puzzle

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Across
  1. 3. an astronomical unit of measurement
  2. 7. the study of the whole universe
  3. 9. a theory of exponential expansion of space in the early universe
  4. 10. change in observed wavelength, or frequency
  5. 12. the observed displacement of an object caused by the change of the observer's point of view
  6. 14. instruments that measure electromagnetic radiation
Down
  1. 1. A black hole is a region of spacetime where gravity is so strong that nothing can escape
  2. 2. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  3. 4. an increase in the wavelength
  4. 5. a unit used to measure tempurature
  5. 6. a completely empty space
  6. 7. cosmic benchmarks for scaling galactic and extragalactic distances
  7. 8. the twin of almost all the subatomic particles that make up our universe
  8. 11. a hypothetical form of matter thought to account for approximately 85% of the matter in the universe.
  9. 13. everything in the universe beyond the top of the Earth's atmosphere
  10. 15. the indefinite continued progress of existence and events in the past, present, and future regarded as a whole.