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Spiral galaxy NGC 3521. This image was obtained in visible and near-infrared light. NGC 3521, which is 50,000 light years across, is 35 million light years from Earth in the constellation of Leo. The data for this image was obtained using the FORS1 (focal reducer and low dispersion spectrograph) instrument on ESO's Very Large Telescope (VLT). The VLT is an array of telescopes where the data is combined using interferometry to produce high-resolution images. The VLT is located at the Paranal Observatory in Chile. Here, visible light is blue and green, and infrared light is red. Image published in August 2011.
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