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 IndexExtragalactic Objects
Galaxies
all the stellar systems placed out of our Galaxy
 
Clusters of galaxies
like stars, galaxies tend to form groups and clusters from ten to thousands members
 
Superclusters of galaxies
groups of galaxies numbering up to one hundred thousand members
 
Radio sources
the celestial objects which are more brighter in the radio band than in the optical one
 
Relic radiation
slowly cooling down thermal radiation, keeps information about the earliest period of Universe evolution
 
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