Sometimes you want a lot more Opera in your Space Opera. While not literally provided, you don't get much closer to the Romance side of Space Opera than you do with The Five Star Stories.
That pic on the side is related, and that means you get Giant Robots in your Space Opera here. You also get laser swords, larger-than-life characters, intrigues that make Soap Opera writers scream in jealously, and magnificent dramas taking place on multiple worlds that shape the fate of billions. None of this "ordinary life" bullshit that the SocJus Death Cult throws around as being desirable or necessary is even considered.
And it is a pain in the ass to get in the West, so you're hunting down fan translations of the comic while wishing someone would just cut a check to get new anime episodes made. The reason you're not hearing much about it outside of the core fandom communities is due to that lack of availability. But the online summaries alone will have you wanting to hunt down what you can find, especially the comic version (which has far more of the story; the anime cuts off early--too early--in the narrative).
As for the anime, it's around, and as a means of introduction it's fantastic. For your convenience, I embedded an upload below. This one splits the anime into two parts; part two is on the video's page at DailyMotion.
The Five Star Stories 1/2 JP[English Sub] by kyriemix
As I have said repeatedly, Japan produces a lot of excellent Space Opera, and too much of it does not come commercially to the West. This is one such example. Embrace the action, romance, and adventure of The Five Star Stories. You will not regret it.