What a rare lensed supernova could mean for measuring cosmic expansion

What a rare lensed supernova could mean for measuring cosmic expansion

A burst of light in the deep sky is doing something it should not be able to do. It looks like one supernova, but it shows up as several copies at once, scattered around two foreground galaxies. The effect is not a telescope trick or a camera glitch. It is gravity, bending the path of the light so it reaches Earth along different routes, on different schedules. The object is SN 2025wny, nicknamed “SN Winny,” and it sits about 10 billion light-ye…