A brief description of what angular momentum is and how it is conserved in the astronomical context.

A brief description of the Doppler Effect and how it can be used to measure the motion of celestial objects toward (via blueshift) and away (via redshift) from us.

A brief description of the inverse square law of light and how we use it to determine the distances of celestial objects.

A brief description of Isaac Newton's three laws of motion.

A basic definition of the distance unit we call a Parsec.

A brief description of how science does not prove things but rather provides evidence in favor of or against a particular theory.

A description of the main piece of evidence supporting the hypothesis that there is a black hole at the center of our galaxy.

A brief description of Kepler's Three Laws of Planetary Motion.

A basic description of an active galaxy and how it produces the energy that we observe from it.

A brief description of the Nebular Hypothesis which is believed to describe how the Solar System formed.