Supernova
A superluminous supernova nicknamed SN Winny, located 10 billion light-years away, appears in the sky five times due to gravitational lensing by two foreground galaxies. Researchers from the Technical University of Munich and other institutions have analyzed this rare event to measure the universe's expansion rate, known as the Hubble constant. The discovery could help resolve the ongoing Hubble tension between different measurement methods.
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Astronomers have identified a bright supernova from over 10 billion years ago, its light gravitationally lensed into multiple images by a foreground galaxy. This unique observation allows simultaneous views of different stages of the explosion. The time delays between images could reveal details about the universe's expansion rate and dark energy.