Astronomers have found a remarkable pair of stars that may finally prove a long-debated theory. Described in the journal ...

Coronas also tend to circle tighter around the moon, creating a 10-degree rather than 22-degree radius. Fogbows are white ...

Coronas also tend to circle tighter around the moon, creating a 10-degree rather than 22-degree radius. Fogbows are white rings, similar to lunar halos, forming low to the ground.