Oh My Heavens!

Closeups of HDF (left) and JDF (right)
Gravitationally lensed arcs, arrowed
Gravitational lensing of a distant galaxy by an intervening massive galaxy cluster

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Retired Physics Professor, Motorcyclist, Bridge Player, Voracious Reader, Philosopher, Essayist, Science/Culture Utility Infielder

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Rex Saffer the AstroDoc

Rex Saffer the AstroDoc

Retired Physics Professor, Motorcyclist, Bridge Player, Voracious Reader, Philosopher, Essayist, Science/Culture Utility Infielder