Encyclopedias

I've been reserching proper encyclopedias.
It was a task just finding them in the library, no one knew where they were and then I found a huge dusty stack of them in the back corner behind some computers. And they're all reference only. So thats convenient.

I went through looking what topics they have
as Britanniaca online demonstrates these are the main topics

It must be hard making proper encyclopedias, like writing down everything that is life and existance. Kind of a big job.
Less so when it's a universe of your own invention. Or more?
No probably less.

So I'm taking the topics I've found in this and other print encyclopedias and boiling them down to what will be relevant to Space Planet

A main consideration when selecting these categories is that they don't die. Or have money
This eliminates the need for a lot of things like medicine, health, religion, economy, war, philosophy, and arguably art and science. Basically anything about human life that isn't about avoiding death or making money, which is a surprisingly large amount of things.

So what I'm left with is

Planets
Heady Leggy's themselves, anatomy
Other life forms/creatures
Plant life
Natural Resources, heat light water - basics
Food
Transport
Homes
Habitats
History? (potentially irrelevant as they are immortal so history doesnt exist because they all remember it happening)
Environments/land areas
Music and some art (most art is about death and humanity in some way, without that they are left with portaits and landscapes)
Notable Figures
Literature?
Language, but thats basically english because I'm lazy

Not sure if any others are necessay but I'd like one page thats a full landscape of Space planet and all the stuff going on in it thats been mentioned in the rest of the book, probably the last page.