“PENUMBRA” на русском языке

an immense penumbra of theory surrounds any observation

And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow.

The Moon begins to enter the Earth's outer shadow, or penumbra , at 9: 06 P.M.

A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow.

The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding.