Astronomers have observed a red supergiant star going supernova for the first time, catching a glimpse of the massive star's final moments of life.
When very large stars run out of fuel and reach the end of their lives, they can explode in massive, dramatic events called supernovas. These explosions throw off enormous amounts of light and energy, but there’s much we still don’t know about how this process happens. Now, astronomers have observed a red supergiant star going supernova for the first time, catching a glimpse of the massive star’s final moments of life.
The team observed the supernova SN 2020tlf using two telescopes in Hawai’i, Pan-STARRS, and the W. M. Keck Observatory. They were able to spot the red supergiant before the supernova occurred as it was giving off significant amounts of light as well as ejecting large amounts of gas. They observed the star for 120 days before it went supernova in fall 2020, and they saw a dense cloud of gas surrounding the star when it exploded.
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