I've had it for a couple years at least (2.5 actually). I don't watch much videos about it though, nor do I go with mods. Probably because I play in bursts anyways, and when I'm not playing there's other video games, and/or Life. Life is a tough game.
You should go on the bbs minecraft server if you have time on that note! It belongs to myself and a friend. ~
Baryonic Astrophysics is basically just astrophysics about the stuff one can see (baryons largely includes stuff made from atoms, simply). So e.g. gas clouds in space, how stars form from them, how we detect them, etc, is what we're starting with. Yay physics.