A brief description of some interesting facts about the planet Mars.

A brief description of some interesting facts about the planet Venus.

A brief description of some interesting facts about the planet Mercury.

A brief description of the different types of telescopes and the most important characteristic to consider when comparing them.

A brief explanation of why the sky is blue within the context of the Scientific Method as described in the episode "What is Science?"

A brief explanation of interstellar reddening and extinction and why understanding their effects is important in astronomy.

A very brief description of the Giant Impact Hypothesis that describes how the moon formed.

A brief description of some of the things we know about the Sun.

A brief description of angular momentum and how it is conserved in rotating systems that we encounter in astronomy.

A brief description of the Hertzsprung Russell (HR) Diagram and its primary feature known as the main sequence.