The document discusses how several character names in the Harry Potter series are references to stars and constellations, particularly within the Black family. It provides examples like Sirius Black being named after the dog star Sirius, Draco Malfoy after the dragon constellation Draco, and Bellatrix Lestrange after the star Bellatrix in Orion. The document also notes some astronomy-related "woopsies" by J.K. Rowling regarding details like times Venus would be visible.