Old-Endor is now Korkar, ice moon of Endor.
Here’s the literature courtesy of Hal: https://starwars.fandom.com/wiki/Korkar
https://vimeo.com/433262581
pw: fanedit
The actual imagery is from Saturn’s moon Enceladus.
More literature (exam is tuesday): https://phys.org/news/2015-10-saturn-icy-moon-enceladus.html