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space, Pandora's Cluster
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keteref said:
posted 2 months ago
Pandora's Cluster
Four smaller galaxy clusters collided to form Pandora's Cluster, a giant cluster 4 billion light-years from Earth. The mass of the galaxies makes up less than 5 percent of Pandora's overall mass - the majority of its mass is composed of dark matter (seen in blue) and hot gas (seen in red) |
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