Astro 1050     Fri., Nov. 8, 2002

M51:  The Whirlpool Galaxy

Density Wave Theory

M51:  The Whirlpool Galaxy

Self Sustaining Star Formation

Two limiting cases of spirals

The Sun in the Milky Way

Milky Way Reconstruction

The Nucleus of the Galaxy

A movie of stars at the core

Review Chapter 12: Milky Way

Chapter 13: Galaxies

The Hubble Deep Field

Types of Galaxies  (pg. 254-255)

Spiral types

Properties of Galaxies

The Hubble Law using galaxies with visible Cepheid variables.

The Hubble Law using galaxies with visible Cepheid variables.

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example using relative v_r and relative d

The Hubble Law using secondary distance indicators
H_o = 72 ±8 km/s/Mpc

The Local Group of Galaxies

The Coma Cluster

Evolution of Galaxies

Effects of Collisions