Telescope as Time machine

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Across
  1. 2. True nothingness
  2. 6. Viewer into the past
  3. 8. Speediest traveler
  4. 12. Space agency of the U.S.
  5. 16. The blanket above us
  6. 17. Like air out in space
  7. 18. Pinwheel galaxy
  8. 20. More than blue
  9. 21. The youngest and the _____
  10. 23. All there is
  11. 25. Star student
  12. 29. Much stranger than that of Alice’s rabbit
  13. 30. What started the whole thing
  14. 32. Surveying the galaxies
  15. 33. Age of the universe, times about 12 years
  16. 34. Opposite of contracting
  17. 35. From where we stand
Down
  1. 1. Pulse of energy
  2. 3. Our galactic home
  3. 4. Raw material for new stars
  4. 5. Our closest celestial family
  5. 7. Nearby star
  6. 9. Amoeba-like galaxy
  7. 10. Common to human, octopus, and some galaxies
  8. 11. Great balls of fire
  9. 13. Make longer
  10. 14. Light made longer
  11. 15. The farthest artifact
  12. 19. How much it shines
  13. 22. Lots made where stars are born, abbreviation
  14. 24. Light gets under your skin
  15. 26. Egg-shaped galaxy
  16. 27. A red star is this
  17. 28. Another eye in the sky
  18. 31. A blue star is this
  19. 34. Change over time