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Fraser
2016-Oct-18, 07:30 PM
We talked about the biggest structures in the Universe, but what about the opposite? The biggest empty spaces in the Universe, the cosmic voids that separate the clusters of galaxies.
The post What Are Cosmic Voids? (http://www.universetoday.com/131508/what-are-cosmic-voids/) appeared first on Universe Today (http://www.universetoday.com).


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