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Star Count

(surveys of stars counting them according to some criteria)

A Star Count is, in effect, an Survey (or analysis of existing survey data) counting stars according to some criteria. Such bookkeeping has progressed from merely characterizing the sky to attempting to determine the density of stars (often effectively re the Sun's own neighborhood), characterizing the stars by Apparent Magnitude and analyzing them to take into account biases that would affect the counts (e.g., Eddington Bias and Malmquist Bias), and to produce accurate characterizations of the density of stars, and counting by Spectral Class to determine the relative lifetimes of the different stellar classes.

Analogous counting and analysis is used for other astronomical phenomena, e.g., galaxies, supernovae, and Extra-Solar Planets. Counts of the former two are considered revealing regarding current ideas in Cosmology.


Referenced by:
Stellar Evolution