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The supergalactic coordinate system is a reference frame for the supercluster of galaxies that contains the Milky Way galaxy, referenced to a local relatively flat collection of galaxy clusters used to define the supergalactic plane. The supergalactic plane is more or less perpendicular to the plane of the Milky Way; the angle is 84.5°. As ...
These differ in their choice of fundamental plane, which divides the celestial sphere into two equal hemispheres along a great circle. Rectangular coordinates, in appropriate units, have the same fundamental (x, y) plane and primary (x-axis) direction, such as an axis of rotation. Each coordinate system is named after its choice of fundamental ...
The second grid above the base grid is the actual supergalactic plane. The base grid parallels the supergalactic plane, and lies 198 million light years below the actual supergalactic plane. The image painted on the base grid is the relevant 885 Mly x 885 Mly section of the CosmicFlows map of the Laniakea Supercluster region.
The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies. The directions perpendicular to the galactic plane point to the galactic poles. In actual usage, the terms galactic plane and galactic poles usually refer specifically to the plane and poles of the Milky Way, in which Planet Earth is located.
A number of different coordinate systems, each differing by a few degrees, were used until 1932, when Lund Observatory assembled a set of conversion tables that defined a standard galactic coordinate system based on a galactic north pole at RA 12 h 40 m, dec +28° (in the B1900.0 epoch convention) and a 0° longitude at the point where the ...
A map of the Shapley Supercluster region, showing Abell 3571 (labelled A3571 in green) relative to it. ESO 383-76 lies at the center of the Abell 3571 galaxy cluster, which is a possible member of the Shapley Supercluster (or alternatively the Shapley 8 Concentration – an outlying structure). [ 3 ]
Map of the nearby universe within 100 million light-years from Earth, including a portion of the Southern Supercluster at the bottom left and the Virgo Supercluster on the right in supergalactic coordinates (click on feature names for more information) The nearest galaxy groups projected onto the supergalactic plane (click on feature names for ...
Supergalactic coordinate system, the coordinate system taking the Local Sheet, the Supergalactic Plane, as its X–Y bases; References This ...