Invisible Planet

Further analysis of … found that all planetary orbits in this system exhibit similar irregularities. After triangulating the gravitational forces implied by these unusual movements, we discovered their cause: a previously unseen planet now known as …. This world possesses a unique surface of carbon black particles which reflect no light or radio waves, making it virtually invisible to long-range scanners. These naturally occurring polymers have remarkably absorbent properties. They will be harvested and studied for their potential uses as a stealth material.

The command below will trigger the "Invisible Planet" event in Stellaris:

When this event fires, you can choose between the following option:

• Fascinating.