Real image SN 1987A located at 1,68,000 light years from earth in Large Magellanic Cloud (Another Galaxy)
you can imagine the power of this supernova by understanding that even it was located at another galaxy it was visible to the naked eye. It was the first supernova that modern astronomers had to observe a SN and to use modern technology in that observation allowing them to gather much more data.
Supernovae are extremwely rare events. About 1 every 200 years is visible and they only last for a month or two.
image of SN 1987A