Across
- 4. The four planets farthest from the Sun: Jupiter, Saturn, Uranus, and Neptune.
- 5. The second planet from the Sun, known for its thick, toxic atmosphere and extremely high surface temperatures.
- 7. Icy bodies that orbit the Sun and develop a coma and/or tail when passing close to it.
- 9. The largest planet in our solar system, known for its Great Red Spot and numerous moons.
- 10. Small celestial bodies that orbit the Sun and are spherical in shape, but have not cleared their orbits of other debris.
- 14. Earth's natural satellite, the fifth largest moon in the solar system, and the only one visited by humans.
- 15. Small rocky bodies that orbit the Sun, mostly located in the asteroid belt between Mars and Jupiter.
- 17. The seventh planet from the Sun, known for its tilted axis and faint rings.
- 19. The star at the center of our solar system, the source of light and heat for the planets.
- 20. The smallest planet in our solar system, and the closest planet to the Sun.
Down
- 1. The four planets closest to the Sun: Mercury, Venus, Earth, and Mars.
- 2. Celestial bodies that orbit the Sun, are spherical in shape, and have cleared their orbits of other debris.
- 3. Small rocky or metallic debris that enters the Earth's atmosphere and produces a streak of light.
- 6. The third planet from the Sun, and the only known planet to harbor life.
- 8. A region beyond Neptune's orbit that is home to many icy objects, including Pluto.
- 11. The eighth planet from the Sun, known for its blue color and strong winds.
- 12. The sixth planet from the Sun, known for its prominent rings and numerous moons.
- 13. A hypothetical cloud of icy bodies thought to surround the solar system beyond the Kuiper Belt.
- 16. The fourth planet from the Sun, known for its reddish color and potential for past or present microbial life.
- 18. The path an object takes as it revolves around another object, such as a planet around the Sun.