Supernova Ejected from the Pages of History | NASA
https://www.nasa.gov/mission_pages/chandra/supernova-ejected-from-the-pages-of-history.html
A new look at the debris from an exploded star in our galaxy has astronomers re-examining when the supernova actually happened.
Recent observations of the supernova remnant called G11.2-0.3 with NASA’s Chandra X-ray Observatory have stripped away its connection
to an event recorded by the Chinese in 386 CE.
New Chandra data on G11.2-0.3 show that dense clouds of gas lie along the line of sight from the supernova remnant to Earth. Infrared
observations with the Palomar 5-meter Hale Telescope had previously indicated that parts of the remnant were heavily obscured by dust.
This means that the supernova responsible for this object would simply have appeared too faint to be seen with the naked eye in 386 CE.
This leaves the nature of the observed 386 CE event a mystery.
