Sophia Learning
Sophia: The Solar System: Lesson 2
This lesson will develop a map of the solar system in proportion to the distance between the planets. It is 2 of 3 in the series titled "The Solar System."
Khan Academy
Khan Academy: Earth's Seasons Aren't Dictated by Closeness to Sun
Explains why Earth's closeness to the Sun does not dictate the seasons. [4:38]