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Cosmic Distance Ladder Lab

Cluster Fitting Explorer
The Cluster Fitting Explorer


The NAAP Cosmic Distance Ladder lab introduces a few of the primary methods used by astronomers to determine astronomical distances. Parallax is introduced first, specroscopic parallax, main sequence fitting, variable stars, and supernova are all discussed.


First time users of NAAP materials should read the NAAP Modules – General Overview page.

Student Guide

Cosmic Distance Ladder Student Guide (pdf)

Main Content