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Optical Gravitational Lensing Experiment

OGLE

Survey

Survey Period1992 - present
Telescope1.3 m Warsaw University Telescope Las Campanas Observatory in Chile
Target FieldThe Galactic bulge and adjoining regions of the Milky Way, also including the Magellanic Clouds
Area (sq deg)2,861 frames, each with an area of 1.4 square degrees), for a total area of 4,005 square degrees
Object Count> 400 million (OGLE-IV)

The use of gravitational lensing allows the OGLE survey to monitor stars at great distances from the Solar System. This image is centred on the yellow dwarf OGLE-2016-BLG-1190 (which is visible here, but only extremely faintly). That star lies at an estimated distance of 22,000 light years in the direction of the Galactic bulge, around which OGLE has detected an extremely massive companion planet or brown dwarf. Imagery provided by Aladin sky atlas

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