They showed an especially bright region at the north pole that, the astronomers said, had all the characteristics of ice reflecting the radar signals.

The bright region seemed to be the coldest, while the shadows were warm.

After some minutes, it came to rest in the brightest region of all.

The title refers to a bright region in the chromosphere of the Sun, named a plage.

Why are the jagged boundaries between the bright and dark regions so sharp, as if they are shorelines?

That is, alternating dark and bright regions may form.

The white background is a 'bright' region of the sky seen straight through the Earth.

The brighter regions show the crests of the atmospheric waves.

The dark lane that extends from the north toward the bright region is called the "Fish's Mouth".

Growth away from light allows the vine to reach a tree trunk, which it can then climb to brighter regions.