Sentences with phrase «central umbra»

The surface intensity shows the sunspot with the dark central umbra surrounded by the somewhat brighter, filamentary penumbra.

Not exact matches

Scientists at NCAR's High Altitude Observatory used a supercomputer to create this 3 - D, high - resolution image of a sunspot's dark central region, called the umbra, and its outer region, called the penumbra.

Sadly, this eerie, awe - inspiring event — known as totality — will be visible only from remote parts of the Northern Hemisphere: Starting in northern Canada, the moon's shadow, or umbra, will glide across the Arctic into central Asia.