The difference between Aureole and Halo

Aureole as a noun:

A circle of light or halo around the head of a deity or a saint.

Aureole as a noun (by extension):

Any luminous or colored ring that encircles something.

Aureole as a noun (astronomy):

A corona.

Aureole as a noun (geology):

A ring around an igneous intrusion.

Halo as a noun:

A circular band of coloured light, visible around the sun or moon etc., caused by reflection and refraction of light by ice crystals in the atmosphere.

Halo as a noun (astronomy):

A cloud of gas and other matter surrounding and captured by the gravitational field of a large diffuse astronomical object, such as a galaxy or cluster of galaxies.

Halo as a noun:

Anything resembling this band, such as an effect caused by imperfect developing of photographs.

Halo as a noun (religion):

nimbus, a luminous disc, often of gold, around or over the heads of saints, etc., in religious paintings.

Halo as a noun:

The metaphorical aura of glory, veneration or sentiment which surrounds an idealized entity.

Halo as a noun (medicine):

A circular brace used to keep the head and neck in position.

Halo as a verb (transitive):

To encircle with a halo.