penumbra

puolivarjo, penumbra A partially shaded area around the edges of a shadow, especially an eclipse.
2011, Galen C. Duree, Jr., Optics for Dummies, Wiley Publishing, Inc. (2011), ISBN 9781118017234, http://books.google.com/books?id=70_kx9vb7lIC&pg=PA61 page 61:

The other places see the penumbra of the moon's shadow fall on the earth, so the eclipse is partial, and part of the sun's disc is still visible.

In the boiling temperature of 119 ° F – the hottest they had experienced so far – they watched as the penumbra of Venus blurred its outline at the precise moment the disc crossed the sun.

The part of the moon that remains in the penumbra receives some direct sunlight, and the glare is usually great enough to prevent your seeing the faint coppery glow of the part of the moon in the umbra.

These firms or businesses are not illegal in the strict sense, but there is a shadowy penumbra within which they live, and it is often convenient for the government to look the other way.

(�) God chose to descend into the realm of human imperfection, where the light of truth is spare and must exist in the penumbra of partial knowledge mixed with partial ignorance.

Unlike some of his contemporaries Parkes never implied that the Irish were close, in the racial hierarchy, to black, condemned to some racial penumbra, between black and white; but nor, given Catholic exclusion from the given traditions of his native radicalism, were the Irish white in the same way that he was.

Whilst the orthodox, de-charismatized churches steadily lose influence and support and the new cults develop, in the religious penumbra there have persisted, during the last century, echoes of charisma.

But for all the expansionist energy of a metro area that sprawls from Wisconsin to Indiana (total population: 7.2 million), downtown Chicago and its penumbra also stand rejuvenated.

Some are accounts of the latest advances, but too many are in that weary penumbra of science inhabited by sociologists, who wander like children in a toyshop, playing with devices they scarcely understand.

The foregoing United States Supreme Court cases suggest that specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance.

El mundo tiene sordas penumbras y desorden,

en los primeros términos que el humano frecuenta.

Pero ya las estrellas ocultando paisajes,

señalan el esquema perfecto de sus órbitas.

:

: -->