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3. - The space agency responsible for the Apollo moon-landing missions.
5. - A telescope that gathers and magnifies visible light from distant objects.
9. cloud - The outermost boundary of our solar system.
10. - Our closest star and the center of our solar system.
11. - The fourth planet from the Sun, often called the "Red Planet."
13. - The eighth and farthest planet from the Sun in our solar system.
16. - The study of the Earth's atmosphere and weather.
18. - The fifth planet from the Sun, known for its great size and stormy atmosphere.

1. - The second planet from the Sun, often called Earth's "sister planet."
2. - The study of the origin, evolution, and eventual fate of the universe.
4. - The study of stars, planets, and the universe.
6. eclipse - A celestial event when the Moon passes between the Earth and the Sun.
7. - The third planet from the Sun and the only one known to support life.
8. - A spacecraft designed for travel or operation in outer space.
12. telescope - A telescope that observes distant objects by detecting their infrared radiation.
14. - A massive celestial body that shines by its own light.
15. - A natural satellite that orbits a planet.
17. - The largest planet in our solar system, known for its colorful bands.