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NASA featured SN Encore, a supernova observed multiple times because intervening gravity bent and delayed its light.
The observation is a vivid example of gravitational lensing turning galaxy clusters into natural telescopes and time-delay instruments.
For astronomy, repeated images of the same explosion can help constrain distances, cluster mass distribution and cosmic expansion models.
Why It Matters
Lensed supernovae give scientists multiple views of the same transient event, adding time information to deep-space imaging.
What to Watch
Watch follow-up lens modelling and whether additional delayed images are predicted or observed.
Primary Sources
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Topics
NASAWebbSupernovaGravitational Lensing