...What now? I finished the tutorial, Planet Scanner 1 is going out to Mercury to look for minerals, 2 is at the moon, doing the same, both the Gravity Scanners are out scanning random asteroids for gravity... I don't know what to do now.
Also: What does SP mean?
"Planet Scanner 2 (SP Needed: 169.13) 1785 km/s"
Edit: Woo, first mineral find! Phobos, Mars' moon, has 22 duranium, 6 tritanium and 2 corundium. All Acc 1, good if we hit some sort of shortage, like today's oil issues but apart from that I am never going to come close to Phobos.
Just letting you know, you're using grav sensors wrong. There are survey locations in the system that you send grav ships to, which try to locate distortions in gravity in the vicinity(or something like that).
The best way I've found to use "explorer" type ships is to go to task groups, special orders, and have their primary default orders either be scan nearest body(if its a geo), or scan nearest survery location(if its grav). You can also have geo ships scan planets, moons, or asteroids first using the same method, if you have a particular interest in one of those types of bodies.
The game, as said before, is pretty open ended. I just started getting into it finely, and I would suggest you find another mineral deposit, since Earth's starts running out quick. Best place to look first is Mars, since that is the only colonizable body on default settings in the Sol system. If not, any of the other bodies work if you transfer automated mines to them. Essentially, you want at least over 10k resources and an acc. of over 0.5 to put automated mines there, and over 50k resources with the same acc. to establish a colony. Otherwise its not worth the effort, and you're just burning fuel.
If there are no mineral deposits worthy of extraction, then turn you're attention outward. Survey, well, survey locations and send a ship with a JG engine(design it first) through a jump gate, or just build a JG construction ship using one of the modules, which can build a permanent JG. From there you can scan bodies and find suitable colonies or minerals.