411 REFERENCE · Wiktionary
MACS
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
MACs Macs macs mačs
English
Proper noun
en astronomy en MAssive Cluster Survey A survey for a statistically complete sample of distant (0.7>z>0.3) very X-ray luminous massive en clusters of galaxies galaxy clusters, culled from the ROSAT Bright Source Catalogue of X-ray sources
Related terms
en SMACS