I made it back to (the edge of) civilization!
All in all, it was about a four hour journey. I scanned over 60 systems, found a system with 3 black holes and a giant water world, as well as some great mining sites. I sold all of my exploration data for $532k. I jumped up from exploration rank "Surveyor" to "Trailblazer". It was about an 800 ly round trip. I started at Founders World and went out to Coalsack.
I cut it into two play sessions. After starting to head back home, I really needed to to something else.
I picked it up this morning and that's when I found the black hole system. I changed the map style to "realistic" and noticed a really strange looking system. It was larger than the others, but had a weird faded look to it. Inside I found a huge star with a black hole next to it. Sadly, black holes are invisible except for an indicator. You also have to fly really close, less than 5 ls, to scan them. No damage or anything. I wonder what would happen if you dropped out of supercruise at one...
In the same system I noticed a lot of volcanic, high metal type planets. These are great to scan, along with the black holes. Scanning rocky and icy planets is a complete waste of time. With the advanced scanner, it'll draw the icon of each planet, so you can get an idea if it's worth scanning.
Took me awhile to figure this out...I probably wasted a good hour scanning useless planets.
The highest reward for a single system was $112k. Definitely not very lucrative, but it was a fun diversion. There's also a weird, unsettling feel about being so far out that I hadn't experienced in the game before.
Here's some random images from the trip (I shared them through Drive, let me know if they don't work):Exploration Pics