Gravitational lensing

Graphics: N. BURGESS/SCIENCE; Data: NASA; Satellite Image: STEVEN RODNEY/UNIVERSITY OF SOUTH CAROLINA; GABRIEL BRAMMER/COSMIC DAWN CENTER/NIELS BOHR INSTITUTE/UNIVERSITY OF COPENHAGEN; Image Processing: JOSEPH DEPASQUALE/STSCI

Cosmic illusions may decide the debate over the rate of expansion of the universe

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An expected reappearance of the supernova SN Requiem, seen repeatedly due to gravitational lensing, may provide a third way to measure the Hubble constant.
The galaxy cluster PLCK G165.7+67.0 and SN H0pe as imaged by the NIRCam instrument on the Webb Space Telescope. Credit: NASA, ESA, CSA, STScI, Brenda Frey (University of Arizona), Roger Windhorst (ASU), S. Cohen (ASU), Jordan CJ D'Silva (UWA), Anton M. Cuckmore (STScI), Jake Summers (ASU)

The Webb Space Telescope discovered a supernova that updates the Hubble constant - the expansion rate of the universe

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The discovery of SN H0pe, a distant supernova that was observed in three replicates using gravitational insolation, allowed researchers to accurately measure the Hubble constant at different times, revealing insights into the expansion rate of the universe
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