The Astronomy Center has provided educational resources to introductory astronomy educators since 2003. Over the past 20 years, the rapid pace of discovery has rendered some of our linked resources obsolete. Thus, the Astronomy Center will be decommissioned on March 1, 2022. Our highest quality resources will be retained on ComPADRE.org.

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Results #1-#4 of 4
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Shapley's Globular Clusters  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
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The EJS Shapley's Globular Clusters Model shows the distribution of globular clusters around the plane of the Milky Way as determined by Harlow Shapley in 1918. The Space View frame…
Differential Galactic Rotation  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
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The EJS Differential Galactic Rotation Model illustrates the model of galactic rotation proposed by Jan Oort in 1927. In Oort's model most of the mass of the galaxy is concentrated…
Herschel's Star Gages  [ Computer Program ]
  
Match Score:
100
Byline:
T. Timberlake
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The EJS Herschel's Star Gages Model illustrates William Herschel's methods of "star gages" by which he attempted to map out the shape of our galaxy in 1785. Herschel's star gages…
  
Match Score:
100
Byline:
A. Fraknoi
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This web page provides a discussion of the different speeds with which someone on Earth is moving in the universe and how astronomers measure such speeds. It includes background…