Looking up in the sky may be a favorite pastime of yours, and if so, you may have spotted a common winter phenomenon.

ROCHESTER, N.Y. — We are looking at another aspect of optics in the atmosphere and the “cool” stuff you can sometimes see in the winter sky ... appears to show the sun (check the video ...

the clouds are high enough in the atmosphere that the sun still shines on them, making them seem to almost glow in the sky,” wrote Alex Innanen, a York University atmospheric scientist ...