Hercules superclusters

Hercules superclusters

[¦hərk·yə‚lēz ′sü·pər‚kləs·tərz]
(astronomy)
A pair of superclusters with recession velocities around 10,000 kilometers (6200 miles) per second, one of which contains the Hercules cluster.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.