luminary

An object, such as a celestial body, that gives light.

In astrology, one of the brightest celestial objects, such as the sun, moon, or bright planets.

A person who inspires others or achieves eminence in a field. synonym: celebrity.

A light-giver; a body that illuminates or gives out light: applied especially to the sun and moon.

Hence One who is a source of intellectual light; a person who illustrates any subject, or enlightens mankind.