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supergalactic plane
An sheet-like structure that contains the Local Supercluster, the Coma Supercluster, the Pisces-Cetus Supercluster, and the Shapley Concentration, and that separates two giant voids – the Northern and the Southern Local Supervoids.
The supergalactic plane is the reference plane for the system of supergalactic coordinates, denoted by L (longitude) and B (latitude). The zero point of supergalactic latitude and longitude is set at R.A. 2h 49m 14s, Dec. +59° 31' 42", and the supergalactic north pole is at R.A. 18h 55m 01s, Dec. +15° 42' 32", (epoch 2000 coordinates).
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