A star exploding at the end of its life has rocked the cosmos like no other that humanity has ever seen. In 2021, astronomers watched in astonishment as a supernova 2.2 billion light-years away named ...
The exploding star is 2.2 billion light years away, and is named SN 2021yfj. The Keck data showed the presence of ionized silicon, sulfur, and argon. These have never been observed in a supernova ...
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