The Crab-Nebula is also a Supernova and Pulsar wind-Nebula in the constellastion of Taurus which made a bright supernova recorded back in the year of 1054 by Japanese/Arabs and Chinese. Till now I haven’t been able to watch the Crab-Nebula by my Telescope but I do follow it’s news on the internet and Google.
Basically, the Crab-Nebula is around 10 light years accross which all-in-all it is 6500 light years away from the Earth.
In 2012, March 3rd the Fermi Gamma-ray Space Telescope spotted a flare from the Crab Nebula, a spike in gamma-ray emission that’s three times greater than the average output. The Italian AGILE satellite detected it, too, and on March 4th both teams sent telegrams calling for more observations.
Astronomers still don’t understand why these events happen. The Crab-Nebula, or “Messier-1”, is the remnant of a Supernova seen on Earth in AD 1054 and one of the brightest gamma-ray sources in the sky.
Inside it the dead star’s core spins 30 times per second as a pulsar, shooting its lighthouse-like beam into space as it whirls. A hot, magnetized wind of electrons and positrons streams away from the pulsar and dumps energy into the surrounding gas, making it glow.