OGLE-2011-BLG-0462 is a gravitational microlensing event that was detected by the Optical Gravitational Lensing Experiment (OGLE), which is a long-term astronomical project aimed at monitoring the brightness of millions of stars in the Milky Way galaxy. Specifically, OGLE-2011-BLG-0462 refers to a particular event that illuminated details about the nature of exoplanets and dark matter.
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