Syided

Mass Effect & Mass Effect 3
The proximity of the energetic star Hercules causes constant blue and violet aurorae in Syided's nitrogen-argon atmosphere. During periods of increased solar flares, the aurorae are bright enough to read by on the surface, and can be seen with off-the-shelf optics from a distance of several AU.

Syided's scorching hot surface is mainly composed of magnesium with deposits of iron. A surprising variety of simple carbon-based life flourishes in a complex network of cave systems that wind through the crust, protected from Hercules' heat and radiation.