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OGLEOptical Gravitational Lensing Experiment
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In June 2003, the Microlensing Observations in Astrophysics (MOA) and Optical Gravitational Lensing Experiment (OGLE) teams saw a star in the galactic bulge brighten by a spectacular 500 times and fade back to normal as a foreground star passed in front and acted as a gravitational lens.
Using the Optical Gravitational Lensing Experiment, astronomers found OGLE 2005-BLG-390L, which has been nicknamed Hoth after the icy planet in the movies.
Sasselov's group bases its findings on data from the Optical Gravitational Lensing Experiment (OGLE), in which ground-based telescopes search for planets and other objects by monitoring thousands of stars for telltale changes in brightness.