“The best known fuel for starships.”
Ultronium (Ut) is a radioactive metal that is one of *the* best fuels discovered. However, the radiation it throws off can easily exceed 100 Sieverts, meaning that it decays fairly quickly and kills fairly quickly. Solarium decays into this material when arc smelted, but only occasionally.
| Learn From | Ingredient For | Teaches | Extracted From | Centrifuged From |
|---|---|---|---|---|
| CT-4 Mining Cannon | Neutronium (Nu) | Neptunium Rod (Np) | ||
| Immunity Field | Thorium Rod | |||
| Nocxium Bar | Solarium Star | |||