also in the past when the past when the crab nebula was made it was witnessed on earth. They were able to see it during the day.
The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.[5] Corresponding to a bright supernova recorded by Chinese astronomers in 1054
http://en.wikipedia.org/wiki/Crab_Nebula
