Anthelion

[Sarah]

A halo opposite the sun, consisting of a colored ring or ringsaround the shadow of the spectator's own head, as projected on acloud or on an opposite fog bank.

[Kai]

a bright spot in the sky that looks like a sun and is at the same height as the sun, but appears opposite it:

[Luis Fok]

A luminous halo around a shadow projected by the sun onto a cloud or fog bank.