A brief description of what is meant by dimensional analysis. In short, the final units in a calculation must be correct for the calculation to be correct.

A brief description of the nature of sunspots and the sunspot cycle.

A brief description of Einstein’s Theories of Special Relativity and General Relativity?

A brief description of how we mathematically relate cause and effect in science. A short description of the equation of a straight line, y=m*x + b is also included.

A brief description of the different kinds of lunar and solar eclipses and how they happen.

A brief description of what makes Earth unique from the other terrestrial planets - active plate tectonics, liquid water, a significant atmosphere, and the rich diversity of life.

Some advice for anyone wanting to pursue professional astronomy/astrophysics as a career choice.

A brief description of how atoms absorb and emit particles of light known as photons based on the Bohr Model of the atom. This leads directly to the creation of absorption and emission lines in the spectra of stars.

A brief description of some deep sky objects whose names you may have heard of in popular culture.

A brief description of what is meant by retrograde motion of the planets in the Solar System.