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Perseus galaxy cluster. The image, taken by the Euclid satellite, shows the Perseus galaxy cluster illuminated by the soft blue light emitted by orphan stars. These stars are scattered throughout the cluster, and reach a distance of 2 million light years from its center. The cluster galaxies stand out in illuminated elliptical shapes against the dark space. Credit: ESA/Euclid/Euclid Consortium/NASA, Image processing: M. Montes (IAC) and J.-C. Cuillandre (CEA Paris-Saclay).

Perseus galaxy cluster. The image, taken by the Euclid satellite, shows the Perseus galaxy cluster illuminated by the soft blue light emitted by orphan stars. These stars are scattered throughout the cluster, and reach a distance of 2 million light years from its center. The cluster galaxies stand out in illuminated elliptical shapes against the dark space. Credit: ESA/Euclid/Euclid Consortium/NASA, Image processing: M. Montes (IAC) and J.-C. Cuillandre (CEA Paris-Saclay).

Perseus galaxy cluster. The image, taken by the Euclid satellite, shows the Perseus galaxy cluster illuminated by the soft blue light emitted by orphan stars. These stars are scattered throughout the cluster, and reach a distance of 2 million light years from its center. The cluster galaxies stand out in illuminated elliptical shapes against the dark space. Credit: ESA/Euclid/Euclid Consortium/NASA, Image processing: M. Montes (IAC) and J.-C. Cuillandre (CEA Paris-Saclay).

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