The angular correlation function is a function which measures the projected clustering of galaxies, due to discrepancies between their actual and expected distributions. The function may be computed as follows: w ( θ ) = 1 N d P d Ω − 1 {\displaystyle w(\theta )={\frac {1}{N}}{\frac {dP}{d\Omega }}-1} , where P {\displaystyle P} represents the conditional probability of finding a galaxy, Ω {\displaystyle \Omega } denotes the solid angle, and N {\displaystyle N} is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth.
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This article is an automated import of the Wikipedia article "Angular correlation function", available at https://en.wikipedia.org/wiki/Angular_correlation_function . Text is licensed under CC BY-SA 4.0.