I had a look for this suggestion, but couldn't find it.

On the planet tab, we can search for specific key words that describe the planet. What about being able to search by using the key owrd of a planet structure? For example, typing "Lepus" in the search box would only show planets that have Lepus drones on them. This would make life easier for keeping track of which planets have upgradeable structures on them (not just the ones with charges, but also phase cutter to Tri-phase, for example), and also quickly checking to see if those 5 pages of enemy planets you just scanned have any decent structures worth stealing!

How 'bout.....no?

IF this is implemented, then it should only be on your own planets.

+1. Why would it matter if it could be used on enemy planets? After a scan run I go through them all anyway to mark ones with notable artifacts. This would make them easier to find later.

I was also thinking this same thing today when placing Polaron Emitters. It would be nice to have a - (like on Google search) where you could put -Polaron and it would filter out any planets with that structure.

I can only imagine how slow the Planet tab would load with it having to look at ALL planets for ALL possible structures...

I'd imagine it would be like scaning for planets.

Scanning for planets is in its current state due to the game apparently loading the entire planet list on every successful scan. I'm guessing that listing all the structures would make the planet list at least 3 times larger, so it would exacerbate the current problem.

How 'bout this.... You want to steal something from them, so you put in the effort to find the thing you want to steal

The best point here.

It might be nice to do this just on the planet window though; you'd still need to open up the planet itself, but you wouldn't need to scroll through and look at all the structures on all the planets, just see if what you're looking for shows up.

Two things:
1) There are way more Unocc planets in your list than any other type combined. I generally only purge before my next scan run. I currently own 290, have 159 enemy, 4 legion, and 746 unocc planets in my list. Adding structure information (while certainly increasing the size) does not affect the majority of planets in your list.

2) A workaround to loading everything when the planet list is loaded is to have the Structure Search option only available when Enemy Planets or Your Planets are selected (the structure list would load only for the set selected).

My current Unoccupied planet data: Showing 1 to 10 of 123 planets (filtered from 982 total planets) which is 12.525% of my total scan count. Therefore your first argument is void. And since your second point is based on an inaccurate assumption, it is also void.

You currently have:
Planets Found 975
Planets Occupied 273

So you have 200 less planets scanned than me, meaning you have purged some between your scan run, or you do not yet have all the scanning tech. If you only have 123 Unocc planets, then somehow you have around 579 Enemy planets meaning you are not purging those for your scan runs - probably not typical of all players, and because your actions may not be typical, your % is void.

#2 does not rely on #1, it is only the 2nd point made and very easily could have been listed first. Your 273 current planets could have their structures listed only when selected just as your 579 proclaimed enemy planets could only show their structures when selected.