In other cases the Moon does not pass through the umbra at all, just going through the penumbra (a region of partial shadow).
an immense penumbra of theory surrounds any observation
A penumbra of fiery purple encircles this near-seamless construction of photographs, objects and painted images on wood.
The Moon begins to enter the Earth's outer shadow, or penumbra , at 9: 06 P.M.
So, one will observe either a total eclipse by the umbra (which can be well observed), a partial eclipse by the umbra and penumbra, or a total or partial eclipse by the penumbra only.
A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow.
And we would do well to remember that the penumbra is the lighter, outer region of the shadow, the halo, indeed, of the shadow.
Theorists suspect that the penumbra is key to keeping a sunspot intact.
He stands within the penumbra of the falls, near the top of Irish Mountain.
The penumbra of his face, and the emanations of light leaking from behind his ears, and his hair, was blinding.