esahubble_opo0003c January 13th, 2000
Credit: NOAO, Cerro Tololo Inter-American Observatory
Two images of a crowded starfield as seen through a ground-based telescope show the subtle brightening of a star due to the effect of gravitational microlensing, where an invisible but massive foreground object passes in front of the star and amplifies its light.
Provider: Hubble Space Telescope | ESA
Image Source: https://www.spacetelescope.org/images/opo0003c/
Curator: ESA/Hubble, Garching bei München, Germany
Image Use Policy: Creative Commons Attribution 4.0 International License
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