First one

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Across
  1. 5. - Multicolored meteorological phenomenon
  2. 11. - Exciting journey or quest
  3. 12. - Explosive displays of light
  4. 13. - Valuable hidden prize
  5. 14. - Tool for magnifying tiny objects
  6. 18. - Brain-teasing game or challenge
  7. 19. - Device to peer into the cosmos
  8. 23. - Place to borrow books
  9. 26. - Celestial event, like a solar or lunar one
  10. 27. - Larval stage of a butterfly
  11. 28. - A vibrant, yellow bloom
  12. 29. - Grid for a strategic game
  13. 30. - Beacon for ships at sea
Down
  1. 1. - Speak very softly
  2. 2. - Navigational instrument
  3. 3. - Long-necked African mammal
  4. 4. - Sweet treat made from cacao
  5. 6. - Creating something new and useful
  6. 7. - Architect's design plan
  7. 8. - Device for underwater viewing
  8. 9. - Space rock that lands on Earth
  9. 10. - Insect with colorful wings
  10. 15. Tree - Tall, sturdy forest giant
  11. 16. - Puzzle with interlocking pieces
  12. 17. - Organized system of dates
  13. 20. - Exciting journey or quest
  14. 21. - All of space and time
  15. 22. - Flying transportation
  16. 24. - Pleasant musical combination
  17. 25. - Pertaining to hot, humid climates