Youngest Supernova Seen
About 140 years ago, in our time, a stellar explosion lit up our galaxy with a blinding flash of light, sending out powerful shock waves to boot. Now, astronomers have spotted the youthful remains from the explosion. The newly discovered remains mark the youngest known supernova remnant in the Milky Way, snagging the record from the previous holder, 330-year-old Cassiopeia A.
Ref. https://www.usatoday.com/tech/science/space..._N.htm?csp=tech