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