A one-in-a-million supernova seen five times could reveal the Universe’s true speed

Scientists have known for nearly a century that the universe is expanding, but the exact rate of that expansion is still uncertain. This ongoing debate has even raised questions about the standard model of cosmology. Now, researchers from the Technical University of Munich (TUM), Ludwig Maximilians University (LMU), and the Max Planck Institutes MPA and MPE have identified and analyzed an extremely rare type of supernova that could provide a new and independent way to measure how f...