Basic Astronomy Concepts Everyone Should Know (with Space Photos): Like Explaining the Phases of the Moon and Evidence for the Heliocentric Theory
The author, Chris McMullen, is a physics and astronomy instructor at Northwestern State University of Louisiana.  He earned his Ph.D. in physics at Oklahoma State University in phenomenological high-energy physics (particle physics).  His doctoral dissertation was on the collider phenomenology of superstring-inspired large extra dimensions, a field in which he has coauthored several papers.