written by michelle starr, on march 29th, 2022
who: astronomer jacco vink of the university of amsterdam in the netherlands
what: cassiopeia a supernova remnant, questionable expansion
when: study last revised march 31st, 2022
where: data came from the chandra x-ray observatory
how: something crashed into the supernova causing it to expand unevenly
Interesting fact: this supernova may have been observed since the 1670’s
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