Went to HIP 19026 yesterday, and today I've been to HIP 14909 (in fact, I'm still on the planet)
The first location was pretty quiet.
But on arriving at HIP 14909 I picked up a distress call, and found a wrecked ship ( I think it's a Federation capital ship) in orbit around planet 1, with the typical damage and green cloud around it.
I've now gone to the site on the second planet and it's a lot more active than the first one I visited, there were a few other commanders there too and I think that some have been inside the alien structure. None of the entrances were open when I was there, I think it needs certain materials to be carried by the visiting CMDRs....
I'll take another look later. Interesting times, eh?
Things had better not get nasty, as I'm in my unarmed exploration Asp Explorer.