system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why aren't there any colonies in Hyperspace?

As far as I can tell Hyperspace is some kinda trippy alternate universe thing. Why don''t they just put some colonies there? Why don't we see any signs of civilization or life there?
gpt
Hyperspace is, in so few words, unstable. The speed of light isn't a barrier there, which means that (thanks to some math that works out with relativity laws), causality doesn't really apply in the same way. There are no stars, no planets, no stellar bodies, and certainly no lifeforms to speak of. In fact, the only matter that seems to exist in Hyperspace are highly charged, faster-than-light particles called Hypermatter. While gravity from realspace can alter the geometry of Hyperspace (hence why navicomputers are so important - running into a star can still kill you, even in a barren parallel dimension), it's not enough for the hypermatter to form into structures.

Really, only two things keep hyperspace travel from being absolutely, insanely dangerous: The fact that Hyperspace can be mapped, one-to-one, with realspace, and that by some quirk of the intersection of physics between real- and hyperspace, along with a ship's onboard passive shielding, Real-matter remains stable in the storm of geometry that is Hyperspace.

To answer your second question, there's just not that much to be gained from building colonies *in* hyperspace. Anything we need to learn can be done through studies on traveling ships for a fraction of the costs, and far less risk.

That being said, it could be that there are things about Hyperspace we may just never understand. Starships *do* go missing every once in a while, and though most of them are likely just stranded somewhere in the interstellar void (A death sentence, if there ever was one - the distances involved make rescue an impossibility) stranger things have been known to happen.  Along backwater starlanes, and sometimes even crowded trade routes, a few pilots a year enter a jump and never come out the other end. 

Some spacers will tell you they came out in the right place, but the wrong time. That ghost ships, Sith dreadnoughts not seen since the Great Hyperspace war, or stranger things, truly alien craft invisible on sensors even as they drift across your view before vanishing without so much as a flicker, are the byproduct of a capricious, impossible universe, right next to our own.

Probably just stories, though.