Uranium

Uranium is a resource.

Source
Uranium is mined by placing a Metal Mine on tiles with Uranium Deposits, or by placing a Basalt Platform on a basalt lake tile.
 * Trace Deposit: +0.25/Uranium a second
 * Low Deposit: +1.0/Uranium a second
 * Medium Deposit: +1.5/Uranium a second
 * High Deposit: +2.0/Uranium a second
 * Very-High Deposit: +2.5/Uranium a second. Only on Io

Uses
Uranium is used to power Nuclear Plants, to power Space Elevator launches, and for shipping if Nuclear Engine is researched.