1. Mercury
a. National Geographic: Planet Mercury, explained
2. Venus
a. National Geographic: Venus, explained
3. Earth
a. Ducksters: Seasons
4. Mars
a. Growing Green on the Red Planet
5. Jupiter
a. The Atlantic: Jupiter's Great Red
Spot Is Behaving Strangely
6. Saturn
a. Ducksters: Planet Saturn
7. Uranus
a. Space.com: Uranus: The Ringed
Planet That Sits on its Side
8. Neptune
a. Space.com: Planet Neptune: Facts
About Its Orbit, Moons & Rings