It could be
dogfighting, like Ace Online and Star Conflict
capital ship fighting like Fractured Space, Dreadnought
space trading/exploration like Elite: Dangerous
space strategy/tactics which I currently don't know too much about, maybe Sins of a Solar Empire, but that doesn't have any players AFAIK.
Just specify to which category the game belongs to and what are your personal experiences regarding the game, also if it's p2w or has toxic community.