--- title: Angular correlation function slug: angular-correlation-function qid: snapshot: enwiki-001187647198 content_hash: license: CC BY-SA 4.0 source: https://en.wikipedia.org/w/index.php?oldid=1187647198 tags: [20476328, 23468805, 23603337, 26220375, 28697634, 90826792] --- # Angular correlation function > [!note] Provenance > Snapshot `enwiki-001187647198` · content root `…` > Derived from · Licensed CC BY-SA 4.0 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(\theta)=\frac{1}{N}\frac{dP}{d\Omega}-1 , where P represents the conditional probability of finding a galaxy, \Omega denotes the solid angle, and N is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth. 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(\theta)=\frac{1}{N}\frac{dP}{d\Omega}-1 , where P represents the conditional probability of finding a galaxy, \Omega denotes the solid angle, and N is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth.