EUROPEAN SOUTHERN OBSERVATORY / SCIENCE PHOTO LIBRARY EUROPEAN SOUTHERN OBSERVATORY / SCIENCE PHOTO LIBRARY
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Gravitational lens. Optical image of a galaxy cluster 1ES 0657-55 in enhanced colours. In the upper right is a thin arc (green), the distorted image of a more distant object 'bent' by the gravity of the cluster. The image was made using the Very Large Telescope 'Antu' at the Cerro Paranal Observatory, Chile.
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