Introduction to Stars, Galaxies, & the Universe
Prof. Richard Pogge, MTWThF 9:30
Felis the Cat (1820)
(detail from Plate XXVI of Alexander Jamieson's A Celestial Atlas)
Unit 1: "The Stars in Their Courses"
The Observed Properties of the Stars
Before we can begin to understand the inner
workings of stars, we must summarize their observed properties. This
entails finding quantitative answers to such fundamental questions as
"How far?", "How bright?", "How massive?", "How big?", etc., and more
subtle properties derived from an examination of their spectra.
Finally, we will ask how the observed properties relate to each other as
a stepping stone to beginning to understand the physics of stars.
At the end of the unit, we will bring together all of the observed
properties into one remarkable synthesis: the Hertzsprung-Russell
Diagram (or H-R Diagram). This diagram will prove to be one of our most
powerful tools for understanding the question of how stars evolve, the
topic of the Unit 2.
- Distances of the Stars (Jan 9)
- The Motions of the Stars (Jan 10)
- Stellar Brightness (Jan 11)
- Stellar Masses & Radii (Jan 12)
- Stellar Spectra (Jan 13)
- Synthesis: The Hertzsprung-Russell Diagram (Jan 17)
Associated Readings in Universe:
- See each lecture...
Return to Astronomy 162 Main Page
Go back to the Introduction
Go forward to Unit 2
Updated: 2006 January 10 [rwp]
Copyright © Richard W. Pogge, All