EVE Online Planets by region

Density counts planets per scanned system, not per system in the region. A region we have only half explored therefore shows the density of the half we know, rather than a number dragged down by systems nobody fetched.

The scanned column says exactly how much of each region those numbers cover.

What a planet is worth to an industrialist comes down to its type: a barren planet extracts the same five raw materials in Genesis as it does in Delve. Every planet page here lists those materials, and the planet resources chart puts all eight types side by side with the P0-P4 chain they feed.

Counting planets is not the same as finding a place to produce: one system with four planet types beats a region full of gas giants. That question belongs to the PI system checker, which takes a single system and says how far up the chain it goes on its own planets.