SH2-240 is a beautiful and large supernova remanent (SNR) in the constellation Taurus. Believed to have happened around 40,000 years ago, the SNR is about 3 degrees in apparent diameter and is located about 3,000 light-years from Earth. Due to the object’s size, the nebula has a low surface brightness and is difficult to observe. A rapidly rotating star called a pulsar, specifically PSR J0538+2817 is believed to be the remanent of the star that caused the supernova, and the pulsar now emits a bright radio signature.
JML Astrophotos 