There are two parts of a shadow: the UMBRA and the PENUMBRA.
UMBRA is the inner darker part of a shadow.
PENUBMRA is the outher lighter layer of a shadow.
During a solar eclipse, the area on the planet that witnesses a complete total solar eclipse would be under the moon's shadow's UMBRA. The area that views a partial solar eclipse would be under the PENUMBRAL shadow.
The green part that surrounds the flower bud is called the sepals. Sepals are important in protecting the developing flower bud and are typically green in color.
The occipital bone is the bone at the back of the skull where the spinal cord attaches to the brain, moving up from there you have a parietal bone on each side and the inter-parietal bone between them
The Bowman's capsule is the part of the nephron that filters substances from the glomerulus. It surrounds the glomerulus and is responsible for collecting the filtrate that is produced.
The prostate gland is located below the bladder and surrounds the upper part of the urethra in males. It is situated just in front of the rectum.
The Bowman's capsule is located in the kidney. It is part of the nephron, the functional unit of the kidney responsible for filtering blood and producing urine. The Bowman's capsule surrounds the glomerulus, where blood is filtered to form the initial filtrate.
The penumbra
the darkest part of the moon's shadow is called the umbra
The darkest part of the moon is called the Umbra. That is the darkest not the largest.
penumbra
That part of the shadow is called the penumbra.
I think you are asking what is the lighter part of the Earth's shadow on the Moon that surrounds the darkest part. The penumbra is this lighter part of the shadow. The darkest part is the umbra.
The "umbra" is the dark area of complete shadow. Around it is the "penumbra", which is partial shadow.
It is called the Umbra, the 'lighter' part of the shadow is the Pen-umbra
The darkest part of a shadow is called the "umbra" The lighter part of a shadow is called the "penumbra" An "antumbra" is the area of light which surrounds the object creating a shadow, as in a "ring of fire" eclipse (like the recent one in May, 2012). It can best be seen when the viewer is beyond the focal point of the umbra, but in line with it.
umbra
The penumbra.
A complete area of shadow is called an umbra. It is the darkest part of a shadow where no light reaches.