Now just fly to each body and shoot it with your Discovery Scanner if fitted to map them all.
Should be Detailed Surface Scanner.
There's diminishing returns on that. I only map planets that are worth 100,000 credits or more. So I map
- Ammonia Worlds
- Earth-like Worlds
- Water Worlds
- High Metal Content Worlds (if terraformable)
- Metal-Rich Bodies
- Rocky World (if terraformable)
- High Metal Content Worlds (non-terraformable) are worth 44,000 credits. There are plenty of them, so it is worth the effort.
Gas Giant Class II is worth 89,000 credits but are generally far out and use a lot of probes
Gas Giant Class I is 12,000
All others are under 10,000 but they are all worth much more than if they are unmapped.