something i can only describe as “space wonder”.
Same, it's the thing i search for in space games, i call it "whoa, space!" effect. Mass Effect had it too. Except those, Stellaris have it in spades, same as Homeworld series, KotOR 1 had it too. Old Ascendancy game is also worth mentioning. Distant Worlds series. Endless Space 2 fallen a tiny little bit too short, having good graphics and amazing music, but the shitty immersion breaking sterile interface.