I have done what I can redo the mod for modern Stellaris.
Thank you Dwaine for the amazing mod from almost six years ago.

Astronomical Objects Reborn
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3256337211

Astronomical Objects Reborn, Quadrant Add-on
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3256338173

Astronomical Objects Reborn, L-Cluster Add-on
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3256338557

As of 2.7, this and the other astronomical objects mods do not work. I have noticed that when I open the ship builder it still shows like normal (except that its spinning at 100 mph). Also, when I tell any ship to move to a new system the graphics show up but they are horribly disfigured and the colors are way off.

Update?

I'm sure there's a way to fix the mod so that things don't disappear. Someone made a fixed version of your Quadrant mod that doesn't disappear, now, so i'm sure it's possible for the L-Cluster, too.

is there a way you can spawn in the L-cluster because being an isolated xenophobe would be cool.

@war-angel, this just add some dust clouds, nebulae, text and visual stars where the L cluster will be. It does change gameplay in any way, you can use it with or without distant stars, but the L cluster will spawn only if you own distant stars.

It just adds effects for the L cluster, like nebulae.

It can't be a small map because it's Ironman compatible. This just adds small nebula textures for aesthetics.

bc it look like just a small map

this dose what ?

@Silver Knight, if you mean create another L cluster with planets and more, yes you can, but it would be a script mod, not what this one is trying to do.

Is it possible to make more l clusters that trigger differently?