Another big interest of mine - is "Life in Space" this means:

life on other planets
buildings (if there are someone) on other planets
spacetraveling
...
I've to say, I'm new to this type of topic (for 1 year now) and still looking for an authentic source for this topic.

You are welcome, in this case, to use our tag #steemstem whenever you post about this stuff! We are one of the oldest communities on Steem, reward pretty well, and consist of basically Nerds and Scientists. It's run by the founder lemouth, who is a PhD in theoretical physics, and myself, a lowly musician, so clearly anyone is welcome! We have discord etc too if you like =)