Irradiated

Irradiated planets are more radioactive than most nuclear test sites. You don't want to be here without the relevant protective filters on your suit. Plants manage to grow here, and life manages to flourish. So it can't be ALL bad, right? These planets are quite rich in Uranium and are the only place where you can find Irradium, along with gas giants.

Codex description

 * Irradiated world. Dense pockets of lethal radiation, and large quantities of Irradium ore detected. Recommend: Severe Radiation protection.
 * This unusual irradiated world should not be visited without extreme radiation protection. Irradium ore detected. Recommend: Severe Radiation protection.
 * Mutated trees and bizarre fauna are abundant on this irradiated planet. Recommend: Severe Radiation protection.

Notable Features
Radioactive Soil can be extracted for mass amounts of Uranium. As mentioned above, these biomes/worlds are the only location for Irradium. Trianglium is also frequently found here. Poison pools are scattered about the surface.