Beakman explains what a comet is by having Liza act like Maria Mitchell. She explains that comets are basically giant dirty snow balls. She goes over the different parts of a comet and why comets look the way they do to us.

Space weather is how the environment around the Earth and solar system may vary because of activity at the sun. The Northern Lights is a harmless example of space weather. It is an effect of an event called a Coronal Mass Ejection or CME.

Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how many worlds might exist in the Milky Way Galaxy.

Countless stars dot the night sky. Learn how these celestial objects form, how they are classified by brightness and temperature, and what happens when they die.

The moon sings a song about some of the things that he does, whether it is change shape, provide light at night, or rotating the Earth.