Across
- 4. A natural satellite that orbits around a planet. Earth has one moon, while other planets have multiple moons.
- 7. The four planets farthest from the sun - Jupiter, Saturn, Uranus, and Neptune. They are large, gaseous, and have no solid surfaces.
- 9. A large object that orbits around a star and has cleared its orbit of other debris. There are eight planets in our solar system.
- 10. The star at the center of our solar system. It's a massive ball of gas that provides light and heat to the Earth.
Down
- 1. The galaxy that contains our solar system. It's a barred spiral galaxy with hundreds of billions of stars.
- 2. The four planets closest to the sun - Mercury, Venus, Earth, and Mars. They are small, rocky, and have solid surfaces.
- 3. The sun and all the objects that orbit around it, including planets, moons, asteroids, and comets.
- 5. A small, rocky object that orbits the sun, usually found in the asteroid belt between Mars and Jupiter.
- 6. A small, icy object that orbits the sun, often with a tail of gas and dust that streams behind it.
- 8. The third planet from the sun and the only known planet in the universe that supports life.