A mosaic of X-ray images of the quasar Q2237+0305, magnified by a gravitational lens. The bright spots are four magnified images of the same quasar, which change in brightness over time. Credit: Courtesy of Ohio State University
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A mosaic of X-ray images of the quasar Q2237+0305, magnified by a gravitational lens. The bright spots are four magnified images of the same quasar, which change in brightness over time. Credit: Courtesy of Ohio State University |
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