Students will use an online simulation to determine the distances to star clusters by fitting the H-R diagram of each cluster to a normal main-sequence line.
Students will then determine the age of each cluster by considering the oldest surviving star on the main sequence, and then determining it's age.
Online simulation uses University of Nebraskas: http://astro.unl.edu/naap/distance/cluster_fitting.html
Materials required: Computers with internet access, scientific calculators, lab packets
Grouping: 2-3 students (suggested)
Level: High School