1. What causes a solar eclipse?, 2. What phenomena keeps the planets in steady orbit around the sun?, 3. Which is the largest star within our solar system?, 4. Why does Mercury have craters?, 5. Which star is the center of our solar system?, 6. What causes high and low tides?, 7. Who was the first person to walk on the moon?, 8. Who was the first person to travel into space?, 9. Who was the first woman to travel into space?, 10. How long does a solar eclipse last?, 11. What is a comet made of?, 12. What do you call a large number of meteoroids occurring at the same time and place?, 13. What color is the sun?, 14. How many Earths could fit inside the sun?, 15. What are the explosions of energy released by the sun’s magnetic fields called?, 16. Which celestial body within the solar system has the most mass?, 17. Why isn’t it possible to walk on Jupiter, Saturn, Uranus, or Neptune?, 18. What is space junk?, 19. What color is Mars’ sunset?.

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