I have acquired the domain name:-

www.aeon.help

which we could perhaps use for the main website (or forum).

.help is a relatively new top-level domain - only about a year old. The vast majority of the many other single-worded aeon domains (that are credibly appropriate) have already been taken.

Given that ultimately a website (or forum) is indeed intended to help, it could be pretty useful and succinct for a community-based non-profit entity such as Aeon.