Observing Our Sky

3. Any of the large celestial bodies that revolve around the Sun in the solar system
5. A natural satellite that orbits a planet; some planets have no moons, and others have over 60 moons
7. Making a complete spin on an axis
9. The star at the center of the solar system that supplies heat and light to Earth; its enormous gravity keeps the solar system in orbit
11. The southernmost point on Earth, as determined by the planet’s rotation
14. The force that causes objects with mass to attract each other
15. The path one object takes as it revolves around another object in space
16. Information that supports an idea

1. The brightness of a star perceived by an observer on Earth
2. A ball of gas in space that produces its own light and heat
4. An imaginary line that Earth rotates around
6. The third planet from the Sun and the only planet in the solar system where life exists
8. To use the senses to examine or inspect
10. The northernmost point on Earth, as determined by the planet’s rotation
12. A push or pull that causes an object to move, stop, or change direction
13. How far from one point to another point