AS102 Study Guide - Final Guide: Sirius, Red Dwarf, Binary Star
Document Summary
We see, once again, that our sun is a pretty average (or mid-range, from a mass perspective) star with a pretty average lifetime. Luminous (high mass) stars are rare because, as we will learn, they have a relatively short lifetime. The histogram at the top right of the diagram (above) shows us that red dwarf stars are the most common (we will study these soon) while white dwarfs are the next most popular. The brightest star in the sky is sirius (often called the dog star). Actually the brightest star is sirius a because sirius is a binary star, sirius a being the brighter of the two, but mostly we refer to this double star as just sirius. We now move onto chapter 7 in your textbook. We have already covered much of what is contained in the first two sections (7.
