If you look into Cahokia at all, you find articles about the monster in Alton, Illinois. Here is a link to a visitor’s site that has what everyone else has as information. Basically, natives shot at this painting and there is a long story about being carried away by big monsters. http://www.greatriverroad.com/Cities/Alton/PiasaBird.htm The locals painted a reproduction at a different location in Alton for tourists since the original location was mined for its limestone..
I do think there is an earlier reference(Underwater Panther) to this from the Missouri History Museum and is not the same super nova but perhaps another constellation? There was also a Super Nova of 1006 and was more round and this reference is also backwards.
Above is a mask from Cahokia from the time of the Super Nova.
In the plate below, middle right, JC Wild had included a strong representation in his book from a time when the original Piasa was still around (1841-1842 and I have access to a better copy of this drawing)
And here is a really bad copy from the description of the plate above: 😀
Now let’s get to the Super Nova of 1054 (sn1054). The Crab Nebula is actually the remnant of Super Nova 1054 and is shown by NASA as this:
The Chinese described this visiting star around that time and said it could cast a shadow at night and was around 1/3 the moon in size (if I remember the size precisely, I can’t find that note).
I believe they are all the same. I overlapped the outline of the JC Wild pic with this picture of the mask and the Crab Nebula and they were all perfect (the crab nebula needed a slight adjustment in width but the plate was hand drawn and the original painting was on a wall 150 ft high. I’ve redrawn the Super Nova as this:
This all got started when I read the book Cahokia by Timothy Pauketat and he referenced the Super Nova briefly. I’m 99.9% positive that the culture is based on the constellations but that’s for another post. Yes, I will have lots of evidence but of course, me being convinced is just the very beginning of the conversation.