Massive foreground galaxy clusters can act as gravitational lenses, bending light from distant objects behind them and creating multiple images of the same astronomical event, such as a supernova appearing to repeat in the same galaxy.
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SN Encore — Supernova Duplicated by Gravitational Lens #JWST #DeepSpace #ShortsAdded:
The image shows a second supernova repeating in the same distant galaxy.
This effect is caused by the gravitational lens of the massive foreground galaxy cluster MAX J0138.
The cluster creates multiple images of the supernova.
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