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written by
Laurence Marschall, Glenn Snyder, P. Richard Cooper, Michael Hayden, and Rhonda Good
educational validator:
HelenMarie Hofman
This lab illustrates how HR diagrams of star clusters are used to determine the distances and ages of the clusters. Students use real photometric data, star positions, and data analysis software to fit HR diagrams to various models. If desired, students can also measure the magnitudes and colors of the cluster stars using a simulated telescope, thus learning how astronomers collect the data.
This is part of a larger collection of simulations, Project CLEA.
Please note that this resource requires
at least version 95 of MS-Windows.
<a href="https://www.compadre.org/astronomy/items/detail.cfm?ID=7832">Marschall, L, G. Snyder, P. Cooper, M. Hayden, and R. Good. CLEA: H-R Diagrams of Star Clusters. August 9, 2008.</a>
L. Marschall, G. Snyder, P. Cooper, M. Hayden, and R. Good, CLEA: H-R Diagrams of Star Clusters (1997), <http://public.gettysburg.edu/~marschal/clea/hrlab.html>.
Marschall, L., Snyder, G., Cooper, P., Hayden, M., & Good, R. (2008, August 9). CLEA: H-R Diagrams of Star Clusters. Retrieved March 16, 2025, from http://public.gettysburg.edu/~marschal/clea/hrlab.html
Marschall, L, G. Snyder, P. Cooper, M. Hayden, and R. Good. CLEA: H-R Diagrams of Star Clusters. August 9, 2008. http://public.gettysburg.edu/~marschal/clea/hrlab.html (accessed 16 March 2025).
Marschall, Laurence, Glenn Snyder, P. Richard Cooper, Michael Hayden, and Rhonda Good. CLEA: H-R Diagrams of Star Clusters. 1997. 9 Aug. 2008. 16 Mar. 2025 <http://public.gettysburg.edu/~marschal/clea/hrlab.html>.
@misc{
Author = "Laurence Marschall and Glenn Snyder and P. Richard Cooper and Michael Hayden and Rhonda Good",
Title = {CLEA: H-R Diagrams of Star Clusters},
Volume = {2025},
Number = {16 March 2025},
Month = {August 9, 2008},
Year = {1997}
}
%A Laurence Marschall %A Glenn Snyder %A P. Richard Cooper %A Michael Hayden %A Rhonda Good %T CLEA: H-R Diagrams of Star Clusters %D August 9, 2008 %U http://public.gettysburg.edu/~marschal/clea/hrlab.html %O application/exe
%0 Electronic Source %A Marschall, Laurence %A Snyder, Glenn %A Cooper, P. Richard %A Hayden, Michael %A Good, Rhonda %D August 9, 2008 %T CLEA: H-R Diagrams of Star Clusters %V 2025 %N 16 March 2025 %8 August 9, 2008 %9 application/exe %U http://public.gettysburg.edu/~marschal/clea/hrlab.html
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