Astronomers see a ghostly radio jellyfish rising from the dead in the southern sky

Clusters of galaxies are the largest interconnected structures in the Universe gravity… They can contain thousands of galaxies, huge oceans of hot gas, invisible islands dark matter and – sometimes – the glowing ghost of one or two jellyfish.

The galaxy cluster Abell 2877, located in the southern sky, contains about 300 million. light years from Earth, astronomers have discovered one such jellyfish. The cosmic jelly, visible only in a narrow band of radio light, is over 1 million light-years across and includes a large petal of supercharged plasma from which tentacles of hot gas flow down.

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