Make Some Space!

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Across
  1. 2. In astrology, this planet impacts our passions
  2. 6. The most delicious galaxy?
  3. 7. This Star Trek actor went to space in real life
  4. 8. This pollution blocks out the stars
  5. 9. Earth's earliest star navigators
  6. 14. You can use this to exercise or to orbit the Sun
  7. 15. They know a lot about space
  8. 16. They definitely exist
  9. 19. This TV show connects the universe and human history
  10. 22. The planetary body where humans are most likely to live after Earth
  11. 24. One of the conditions for life (as we know it)
  12. 25. Keeps me on the edge of my seat
  13. 26. Some scientists think aliens could use this to contact us
  14. 27. A popular astronaut treat
  15. 31. Let there be light?
  16. 32. Dinosaurs should watch out for this
  17. 33. This gas is created in the Sun
  18. 34. The final frontier
  19. 35. How humans describe the laws of the universe
  20. 36. It's everywhere, but no one knows what it is
  21. 37. From our perspective, this star does not appear to move
Down
  1. 1. Our Sun's nearest neighbor
  2. 3. Don't leave home without it
  3. 4. Geographically, the last stop on the Carl Sagan planet walk
  4. 5. This gas is converted in the Sun
  5. 7. This space movie has the biggest cinematic reveal in history
  6. 10. What happens at the edge of the universe
  7. 11. It wouldn't be this if Earth was at the center
  8. 12. To us, this planet seems sideways
  9. 13. The light of my life
  10. 17. They're always around us
  11. 18. Life on Mars? More likely in another ___________.
  12. 20. Someone liked it so they put a ring on it
  13. 21. It would turn us into spaghetti
  14. 23. Astronauts need to learn how to do this in order to function without gravity
  15. 25. Science could prove or disprove this, depending on who you ask
  16. 28. The likely next step for Earth's Sun
  17. 29. Essential for lively parties and planets
  18. 30. In the movie Independence Day, he saved the world from evil aliens
  19. 34. Patrick Stewart is in charge