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13.1: Module Introduction

Last updated

Nov 20, 2024
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- 13: Galaxies
- 13.2: What do you think?

Lumen Learning
Lumen Learning

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“There are at least as many galaxies in our observable Universe as there are stars in our galaxy. ”

Martin Rees
Lord Rees of Ludlow
Astronomer
(1942 -)

This module presents an overview of the islands of stars found throughout the Universe: the galaxies. Like many objects we have discovered, galaxies vary in characteristics such as size, shape, and age.

Objectives

Upon completion of this module, the student will be able to:Upon completion of this module, the student will be able to:

Define what a galaxy is and the broad characteristics of galaxies, including galaxy types.
Explain the history of observing galaxies.
Recognize Hubble’s Law and its implications in astronomy.
Differentiate among galaxy-related objects, including Quasars, Blazars, galactic grouping, WIMPs, gravitational lensing

Objectives

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