Astro-2: History of the Universe Lecture 2; April 6 2006.
The Universe of Galaxies. A Brief History 1610 - Galileo.
NOTES: Cepheid Variable Stars: John Goodrick (1784) discovered Delta-Cephei. Henrietta Leavitt (1908)--Period Luminosity Relation: (overlay). Stars varying.
Galaxies With a touch of cosmology. Types of Galaxies Spiral Elliptical Irregular.
Galaxies Chapter 13:. Galaxies Contain a few thousand to tens of billions of stars, Large variety of shapes and sizes Star systems like our Milky Way.
The Expanding Universe. Getting the Distances to Galaxies is a “Big Industry” solar system 10 A.U. radar ranging Local Galaxy 100 pc stellar parallax.
Galaxies Please press “1” to test your transmitter.
Galaxies Chapter 16. Our Milky Way Galaxy is only one of the many billions of galaxies visible in the sky. This chapter will expand your horizon to discuss.
Galaxies, AGN and Quasars
Astro-2: History of the Universe
