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Shapley's Globular Clusters Documents
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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 shows a 3D view of the distribution of the clusters around the galactic plane, along with the location of the Sun and Shapley's location for the galactic center (as well as the boundary of what Shapley called the "Big Galaxy") as determined by the cluster distribution. Globular clusters are shown in different colors depending on how their distances were determined: using Cepheid variables (red), brightest stars in the cluster (green), or apparent diameter of the cluster (blue). Other windows show a plot of the cluster locations projected onto the galactic plane, a plot of the number of clusters versus galactic longitude (showing a peak toward Shapley's proposed galactic center), and a histogram of distances from the galactic plane (showing a dearth of clusters very close to the plane).
Last Modified October 7, 2013
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Source Code Documents
The source code zip archive contains an XML representation of the EJS Shapley's Globular Clusters Model. Unzip this archive in your EJS workspace to compile and run this model using EJS.
Released under a This material is released under the GNU General Public License Version 3.
Published May 18, 2011
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