Strange Anomaly underneath the North Pole of Duna

[KcEdwards]

On my sandbox save, I decided to send a rover to Duna to explore the different terrains as well as test the functions of Hyper Edit. I set it to land on the North Pole of Duna where there is a sharp Mountain reaching out of the ground with some cliffs, as the rover tumbled down the mountain, the chase camera clipped through the mountain and this is what I saw, has anyone else seen this before or does anyone know what this is?

[Vanamonde]

The glowing thing? Is a graphics glitch. There's one at the core of every planet, which you can only see when the camera is accidentally looking under the surface of the planet.