IC 443 (also known as the Jellyfish Nebula) is a galactic supernova remnant (SNR) in the constellation Gemini. In fact, the bright star bottom is the toe on 1 of the twins. Its distance is roughly 5,000 light years from Earth. It has a magnitude of 12, so not vidible to the naked eye. To put this in perspective, the light you are seeing in this photo left the nebula right around the time our ancestors were starting to work with metal and making tools and weapons from bronze.
The theory is that it may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the a neutron star, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.
This represents 2.5 hours of 300 second exposures taken March 15.
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