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Overview
Wolf diagram
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A graph of star counts at various apparent magnitudes, from which the distance to a dark nebula can be determined. Max Wolf first plotted star counts for a dark nebula and a comparison field on the same graph, and used the magnitude at which the two counts started to diverge to estimate the distance at which the obscuration began.
From: Wolf diagram in A Dictionary of Astronomy »
Subjects: Science and technology — Astronomy and Cosmology
