Digging

The rates at which you will find artifacts depends on the following factors:


 * Time of Day: cf. Dig Times
 * Planet Type - ranked from best to worst to dig on:
 * U.Spazial
 * Oceanic
 * Gas
 * All others: Balanced, Forest, Barren, Rocky, C1, C2, C3, Dead

Contrary to popular belief, it does NOT depend on:


 * Planet size
 * Loyalty
 * Whether the planet is S. or X. type.