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13.11: Module Introduction

  • Page ID
    93935
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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
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