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GCL3409264: SPACE: GALAXY CLUSTER A view of the galaxy cluster Abell 2218 in the constellation Draco, about 2 billion light years from Earth, with an arc-like pattern produced by the gravitational lensing effect of the cluster on the light from more distant galaxies. Photographed by NASA's Hubble Space Telescope, January 2000. / Bridgeman Images
GCL3409289: SPACE: BLACK HOLE, 1997 Right: Image made by the spectrograph of NASA's Hubble Space Telescope, 1997, showing the pattern formed by gases affected by the gravitational pull of the black hole at the center of galaxy M84. Left: A wider view of M84 taken by the Hubble Space Telescope, also in 1997, with the core of the galaxy outlined in blue. / Bridgeman Images
GCL3409342: AGRICULTURAL RESEARCH, 1971 Scientist Thomas Pieper examines the topography of a test segment of terrain, photographed by satellite during the Corn Blight Watch Experiment, conducted by NASA and the U.S. Department of Agriculture. Photographed at Purdue University in Lafayette, Indiana, 1971. / Bridgeman Images