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Manipulated image of the Perseus galaxy cluster taken by the Euclid Space Telesc
Manipulated image of the Perseus galaxy cluster taken by the Euclid Space Telescope. The brightest galaxies in the cluster, NGC 1275 (left) and NGC 1272 (right), stand prominently in the centre. The black distribution emphasises the diffuse light traversing the cluster along a distance of more than a billion light years, the origin of which has now been investigated. Although this ’intra-cluster light’ is much fainter than the bright galaxies in the cluster, it contributes a full 20 per cent of the total brightness. The origin of this light was therefore the focus of a study by the Max Planck Institute for Extraterrestrial Physics. © Euclid consortium, MPE

New scientific data from the Euclid Space Telescope reveals the mystery of the faint glow in the Perseus galaxy cluster

The Perseus galaxy cluster was one of the first targets of ESA’s Euclid space telescope. It contains thousands of brilliant galaxies, as heavy as 650 trillion suns, held together by their own gravity. For a long time, however, it was not clear where the faint and uniform glow that flows through the galaxy cluster originated. ...

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