Rare constellations on Space stage

[BigBoy "!.OutLawZ.!"]

I discovered proto star (made screenshot and posted it already), double systems and so on, what systems are to find and what is most rare?

[blaze_tecumseh]

There are several varieties of the binary star systems, black holes, and the Galactic Core at the center of the galaxy. There is a total of ten rare Galactic Formations and Objects, including a hidden spacecraft you will encounter at the Galactic Core (mousing over the tiny flying saucer that appears at the heads-up display near the bottom of your screen will give you information to help you find the Galactic Core). You can also find our own solar system, Sol, at 225.06° 7295.43 Pc. I cannot remember if finding Sol and Earth are counted as a rare discovery, however, but there are two achievements associated with finding our home planet.

I think the most rare of all the formations and objects would be those two that are related to the Galactic Core.