Hercules basin

A supercluster defined by motion: the region whose galaxies all flow toward one attractor, around the Hercules Supercluster. One of the five such basins around Laniakea.

Its outline is the watershed Dupuy and Courtois (2023) traced through the Cosmicflows-4 velocity field, reconstructed from the measured distances of about 56,000 galaxies on a grid of 37-million-light-year cells, so its edges are approximate. Distances use this map's Planck Hubble constant; on Cosmicflows' own they are a tenth smaller. The threads are streamlines of the same field, the paths matter is moving along; their moving dashes show which way, not how fast.

Across

about 874 million ly

End to end

1.50 billion ly

Attractor

539 million ly from the Sun

The Hercules Superclusters refers to a set of two nearby superclusters of galaxies.

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