Astro Space Club Puzzles

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Across
  1. 2. "The objective is to prove that living organisms can survive even when launched into orbit."
  2. 4. "The longest day of the year when the sun reaches its highest point in the sky."
  3. 5. "Pluto"
  4. 8. "The "Red Planet"
  5. 9. "Pioneer of telescopic astronomy who challenged the geocentric model."
  6. 13. "Frozen celestial body with a glowing tail"
  7. 14. "The star at the center of our solar system"
  8. 16. "Hawking temperature"
  9. 18. "Discoverer of laws describing planetary motion in elliptical orbits."
  10. 19. "Famous space agency of the United States"
Down
  1. 1. "Galactic Halo"
  2. 3. "The first person to walk on the Moon"
  3. 6. "organization in Thailand responsible for the research, education, and dissemination of knowledge about astronomy and space."
  4. 7. "Astronomer who proved the universe is expanding, leading to the Big Bang theory."
  5. 8. "Our home galaxy"
  6. 10. "beautiful rings"
  7. 11. "Polish astronomer who formulated the heliocentric theory."
  8. 12. "Active galactic nuclei"
  9. 15. "Massive explosion that started the universe"
  10. 17. "The first landing on the Moon occurred in 1969."