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 ...

(CNN) — Astronomers have observed what they are calling a new type of supernova, which has provided an unparalleled glimpse into what happens deep within a star just before it explodes. A study ...

When a massive star dies, astronomers expect a familiar chemical script: hydrogen and helium on the outside, heavier elements buried deep within. The latest observations of a stellar explosion known ...

In November 1572, a brilliant new star appeared in the constellation Cassiopeia, shining so brightly that it was visible during the day. Danish astronomer Tycho Brahe carefully documented this ...