Astronomy Crossword

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Across
  1. 1. Earth's Energy Source
  2. 3. Planet with extensive ring system
  3. 4. Dwarf Planet
  4. 6. This is lost with time in outer space
  5. 9. Planet closest to the Sun
  6. 10. The Red Planet
  7. 13. Time it takes for the ISS to orbit Earth
  8. 15. ISS Energy collector
  9. 16. 2018 NASA Mars Lander
  10. 17. Seed Germinating Experiment
  11. 18. These shrink with time in outer space
Down
  1. 1. Distant sun
  2. 2. Robotic Arm on the ISS
  3. 5. Planet Path
  4. 7. The last gas giant
  5. 8. Symptoms include nausea and dizziness
  6. 11. The Man Who Tweeted Earth
  7. 12. The largest planet
  8. 14. A Russian Astronaut
  9. 19. Water World