"Umbra" is correct. However, another way to look at it is that the darkest part of the Earth's shadow is midnight, for what is night but the shadow of the Earth?
The Umbra is completely dark. Partially Dark is Penumbra.
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.
penumbra cats a dull shadow. Umbra cats dark shadow.
umbra a dark area especially the blackest part of a shadow from wich all ligth is cut of
it is called the penumbra
your shadow
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.
There are two parts to the Earth's shadow. The dark narrower part is the Umbra (from Latin for shadow). The lighter part is called the Penumbra (from Latin, pane umbra - almost a shadow)
The darker complete shadow is the "umbra". The lighter partial shadow is the penumbra.
Umbra is the latin translation meaning shadow.
the darkest part of the moon's shadow is called the umbra