Origin of Our Universe. Before the Big Bang? As cosmologists begin to understand what happened just after the Big Bang, many are questioning what led.
Another galaxy: NGC 4414. The Milky Way roughly resembles it.
Chapter 15 Normal and Active Galaxies. Units of Chapter 15 Hubble’s Galaxy Classification The Distribution of Galaxies in Space Hubble’s Law Active Galactic.
LECTURE 27, DECEMBER 9, 2010
Milky Way Galaxy. A galaxy is a group of stars, dust, and gases held together by gravity.
1- Where is our sun in the H-R diagram? 2- What color is our sun? 3- How much longer will our sun last? 4- What is the next stage of our sun?
Objectives Describe how astronomers classify galaxies. Identify how galaxies are organized into clusters and superclusters. Describe the expansion of.
What is a star? A big ball of gas & nuclear fusion.
Types of Galaxies
Molecular gas flows in galaxies
Galaxies – Island Universes Here’s the Story We’ll Unfold for You… Hubble’s galaxy classifications: Spirals, ellipticals, irregulars. Structural parts.
Universe Eighth Edition
