Universe!

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Across
  1. 2. First human in space
  2. 3. Stanley Kubrick movie, 2001:A Space _______
  3. 5. This ringed planet takes 29.4 Earth years to orbit the sun
  4. 9. Famous telescope launched in 1990
  5. 11. Taylor Swift album
  6. 14. Boundary marking the edge of our solar system
  7. 15. 'One small step for (a) man, one giant leap for mankind'
  8. 18. Beatles song; Also a 2007 Movie
  9. 21. Massive explosion marking a star's end
  10. 22. Movie about space exploration with Matthew McConaughey
  11. 23. Elon Musk's space exploration company
  12. 24. A ________ is an increase in the wavelength, and corresponding decrease in the frequency, of electromagnetic radiation
Down
  1. 1. Astronomical Unit (300,000 km/s or 9.46 trillion km's per year)
  2. 4. Closest star to Earth
  3. 6. Spacecraft that first landed humans on the moon
  4. 7. Spacecraft that landed on Mars in 2021
  5. 8. Planet known as the "Red Planet"
  6. 10. Taylor Swift song
  7. 12. Precession of the ____________
  8. 13. Largest planet in our solar system
  9. 16. Closest planet to the Sun
  10. 17. Galaxy we live in
  11. 19. Famous astronomer who developed heliocentrism
  12. 20. David Bowie song, ' Ground control to Major Tom ...'