The Supergalactic Coordinate System is a
spherical coordinate system used for directions in the
fixed to the Supergalactic Plane, and the line intersecting that
plane with the Galactic Plane.
- Supergalactic Longitude: SGL or l "east" from the line along the intersection, basically galactic coordinates l = 47.37°, b = +6.32°.
- Supergalactic Latitude: SGB or b.
The Supergalactic Plane is a plane of nearby Galaxy Clusters (CL)
including the Virgo Cluster, the Great Attractor
and the Pisces-Perseus Supercluster.
(coordinate system,celestial sphere)
Celestial Coordinate System