Scientists have identified the location of history’s last unexplained supernova. Results published on: Astrophysical Journal Letters (ApJL).
In 1181, a new star shone near the constellation Cassiopeia. His disappearance six months later was noted by Chinese and Japanese observers. In fact, they saw a supernova, one of the few supernovae documented before the invention of telescopes. A supernova occurs when an explosion causes a star to suddenly increase in brightness, and then the object fades away.
The supernova was called SN 1181, but for a long time scientists could not find the specific star that ancient astronomers saw.
In the new study, scientists used data from the KCWI spectrograph located at an altitude of more than 4,000 meters at the Keck Observatory in Hawaii. They created a 3D map of where SN 1181 might be located.
It turns out that during the supernova explosion, star material is thrown out at a speed of about a thousand kilometers per second. Using this speed, scientists confirmed that a supernova explosion could be seen on Earth in 1181.
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Source: Gazeta
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