Hence during a lunar eclipse the moon first enters the penumbra, then is totally or partially immersed in the umbra, then emerges through the penumbra again.
Stationed just beyond the edge of the area of most intense illumination, the audience sat in a sort of violet penumbra whose effect was hideously unflattering.
But that was no place for it; they had to go without their tea, and everybody who sat on the settle bumped his head against the kettle.
He howled when he stumbled over his own dinner pots that he had left in the middle of the floor; and he stood in his front door and scowled when other happy elves went by without speaking to him.
The portion of the earth's surface ever covered by the moon's penumbra is about four thousand three hundred and ninety-three miles.
Hence a spot seen obliquely, as when carried toward the Sun's limb, will have its umbra more and more hidden, while its penumbra still remains visible.
They will be greatly elongated; and there will so be produced that "thatch"-like aspect which the penumbra presents.
Then he found himself face to face with the same phases reproduced, but in the reverse order: the penumbra contracted on one side and full on the other, widening out on the contracted side as the spot came up to the Sun's centre.
A marked contrast subsists in all cases between the luminosity of the penumbra and that of the general surface of the Sun contiguous.
Towards its exterior edge the penumbra is usually darker than at its inner edge, where it comes in contact with the umbra.
Let us suppose we chanced to turn a telescope on to the Sun on a given day, and were fortunate enough to discover a spot in the centre of the disc, with a penumbra concentric with the nucleus.
It is not always the case that each individual umbra has a penumbra all to itself, for several spots are occasionally included in one common penumbra.
Very soon after their formation is complete, tonguelike encroachments of the penumbra appear to force their way across the umbra, and this splitting up of the central spot usually goes on quite rapidly.
Whatsoever Penumbra or Perturbation should be made in the Circles by the cross Refraction of the second Prism, all that Penumbra or Perturbation would be conspicuous in the right Lines ae and gl which touch those Circles.
And therefore since there is no such Penumbra or Perturbation in those right Lines, there must be none in the Circles.
Odo's eyes swam with the splendour of this burst of banners, images and jewelled reliquaries, surmounting the long train of tonsured heads and bathed in a light almost blinding after the mild penumbra of the church.
Legal, like natural divisions, however clear in their general outline, will be found on exact scrutiny to end in a penumbra or debatable land.
For it can hardly be supposed that a man's responsibility for the consequences of his acts varies as the remedy happens to fall on one side or the other of the penumbra which separates trespass from the action on the case.
An eclipse of the sun is called central when the shadow axis strikes any part of the earth; partial when only the penumbra falls upon the earth.
First, from the values of the latter at a given moment to determine the point, if any, at which the shadow-axis intersects the surface of the earth, and the respective outlines of the umbra and penumbra on that surface.
The light still shone within its pearly shade, and in the penumbra of its shadow the portrait of Andriaovsky occupied its accustomed place.
It stood there, just within the soft penumbraof shadow cast by the silk-shaded light.
The penumbra will last quite a long time yet, but it will gradually get fainter and fainter.
But it was all growing dimmer and dimmer as the penumbra faded toward the perfect light.
The West is plunged in the penumbra of the rays of the blue sun, while the East is illuminated with the purple and burning rays of the ruby orb.
The world became a sort of kaleidoscope to us, seen in a dream through the penumbra of an aquarium.
In truth the feeling involved, if conceived at all, is conceived most vaguely, and is only a sort of reverberation or penumbra surrounding the pictured activities.
The moon entered its eastern edge into the Penumbra at 8.
Now I will try and explain to you what the Penumbra is and how it is produced.
They rode down into gorges, deep crevices, in which reigned a sepulchral penumbra and where buzzards hopped close by the dead body of some abandoned animal.
A mysteriouspenumbra began to form beneath the trees.
When a series of solar eclipses begins, the penumbra of the first will just graze the earth not far from one of the poles.
It will occasionally happen that the Moon gets immersed in a penumbrabut escapes the dark shadow.
Therefore I knew that if the moon entered the penumbra at Greenwich (although invisible) on the 30d.
The penumbra is brightest at its inner edge, where the filaments present a marked contrast when compared with the dark cavity of the umbra which they surround and overhang.
The darkest portion of the penumbra is its external edge, which stands out conspicuously against the adjoining bright surface of the Sun.
One penumbra will sometimes enclose several umbræ whilst the nuclei may be entirely wanting.
The beachcomber himself, pale as putty through his half-grown beard, was beseeching us from the pink penumbra of the Apostle Paul: "You seen it?
The umbra of a sun-spot is anywhere from a few hundred miles to fifty thousand miles in diameter, frequently exceeding the earth in size, while the penumbra occasionally reaches a diameter of two hundred thousand miles.
The umbra is the darker central portion, the funnel of the whirling cyclone, and the penumbra is composed of the outspreading gases, and is less dark than the umbra.
What spectacle confronted them when they, first the host, then the guest, emerged silently, doubly dark, from obscurity by a passage from the rere of the house into the penumbra of the garden?
Slight alterations in the strength of the sensation,[123] in the degree or direction of attention, and in the composition of that penumbra of vague images which it calls up, occur at every distinguishable fraction of time.
Our luminous circle of rational perception is surrounded by a misty penumbra of illusion.
Forebodings tortured him, and in the penumbra of his thoughts seemed to leave something he could not shake off--a vague, haunting fear, as if of some impending tragedy that should wreck their future.
If the least of pity played a part in suggesting that her safest course was to help de Spain, Nan kept its promptings as much as she could in the penumbra of her thoughts.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "penumbra" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: gloom; shade; shadow; silhouette; umbra; umbrage
