The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light
region of partial shadow that is outside the umbra; the light source is partially blocked
portion of the shadow from which part of the light source is excluded when a body passes over the light source
paena = [Latin] almost; umbra = [Latin] shadow A penumbra is an annulus (thick ring) around the umbra of a sunspot The penumbra is less dark than the umbra, but is darker than granulation The penumbra appears to be built up of many fibers that point away from the center of the sunspot The high-resolution continuum image shows a big sunspot with a penumbra
Portion of the shadow cast by an eclipsing object in which the eclipse is seen as partial
The sunspot area that may surround the darker umbra or umbrae In its mature form it consists of linear bright and dark elements radial from the sunspot umbra
The partly shaded area around the shadow of the moon during the solar eclipse Those experiencing a partial eclipse will be within the penumbra
an area of stroke-damaged, oxygen-starved tissue surrounding the infarct that is not irretrievably injured
The sunspot area that may surround the darker umbra or umbrae It consists of linear bright and dark elements radial from the sunspot umbra
The lighter part of a shadow that is formed by diffused light in an area around the edges of an object
the part of a shadow (as of the Moon) within which the source of light (the Sun) is only partially blocked out
The portion of a shadow that is only partially shaded We would see part of the sun peeking around Earth's edge In the penumbra, the sunlight is dimmed but not extinguished
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Bir ışık kaynağı önüne konulan saydam olmayan bir cismin gerisindeki ekran üzerine vuran gölgesinin çevresinde görülen, çok koyu karanlık olmayan bölümü