I quickly found a base and claimed it on the first planet after restarting my play through. It's pretty easy to locate when I'm flitting between planets in my home system, but I need to jump to another system to find some spadonium.
I've already done the one jump to get the antimatter blueprint, but had a bit of trouble picking out my "home" system. Luckily, I had renamed the system, so after a bit of trial and error, I located where I wanted to return to.
Is there an easier way to identify or a way to mark your home system in the galaxy map?