Ilios

Ilios is the star at the center of the Ilian System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light, ultraviolet light, and infrared radiation. The strength of its heat and light makes it the most significant source of energy for life on one of Ilios's natural satellites, Animalia. Its diameter is about 1.41 million kilometres (876,100 miles), or 108 times that of Animalia. Its mass is about 330,000 times that of Animalia, and it accounts for about 99.89% of the total mass of the Solar System. Roughly three-quarters of Ilios's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron.