The Hubble Law: An Introductory Astronomy Lab


E.P.Hubble at Palomar

Edwin Hubble Discovers the Universe

Credit: Mt. Wilson Archive, Carnegie Institution of Washington Explanation: No person in history has had greater impact in determining the extent of our universe than Edwin Hubble. From proving that other galaxies existed to proving that galaxies move apart from one another, Hubble's work defined our place in the cosmos. Hubble lived from 1889 to 1953 and is shown above posing with the 48-inch telescope on Palomar Mountain and his famous pipe. In memory of his great work, the Orbiting Space Telescope was named after him. Today a great controversy rages on the rate of the universe's expansion, parameterized by a quantity known as Hubble's constant.

Picture and caption from Astronomy Picture of the Day, February 17, 1996. Corner animation adapted from an illustration at STScI public information site.

Table of Contents

All of these instruction sheets are available for downloading in at instruction sheets and answer sheets.

Objective, Introduction, and Overview

Studying and Selecting the Galaxies (Steps 1 and 2)
The Galaxies and Their Spectra (use for selecting)
Gallery of Galaxies (just the galaxies)
Galaxy Overview Sheet (PDF) (turn in)

Measuring the Velocities and the Distances (Steps 3 and 4)
Data Table Sheet (PDF) (turn in)

Graphing, Data Analysis, and Questions (Steps 5 and 6)
Table of Results and Questions Sheet (PDF) (turn in)


Link to the Clickable Images and Spectra




This lab represents modifications and additions made by Ana Larson, to the original Hubble Law Lab developed by members of the Astronomy Department at the University of Washington. The real credit goes to the people involved in the original package. The list of the cohorts and information regarding the images and spectra may be found in the credits.


©1996, 1999, 2000 University of Washington
U.W. Astronomy Department Homepage
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