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Starfield.jpgStarfield...53 visitenessun commento
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StillWaters1.JPGStill Waters n. 1 (by Roberto Tremolada)53 visitenessun commentoMareKromium
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StillWaters2.JPGStill Waters n. 2 (by Roberto Tremolada)54 visitenessun commentoMareKromium
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Storni.jpgBirds drawing a Bird....165 visiteUno stormo di storni, mi dicono "...in volo sopra la Casa Bianca...".
Visto il paesaggio sottostante, non credo proprio....
Comunque - sia come sia (ed immagine a parte, che penso essere stata ottenuta in aperta campagna) - la notizia diceva che si era trattato di uno stormo talmente fitto da far pensare ad un velivolo vero e proprio.
Non commento le riflessioni fatte dai Servizi di Sicurezza Americani (che, se vere, sarebbero ridicole), ma Vi invito a guardare il "disegno" che lo stormo ha tracciato nel Cielo: a me sembra una colomba in volo stilizzata.
"Vedo" bene le ali, la testa ed il becco.
E Voi? Vedete qualcosa?!?MareKromium
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Sun Halo-2.jpgBright Sun, Dark Sky58 visiteCaption originale:"Have you ever seen a halo around the Sun? This fairly common sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. Each ice crystal acts like a miniature lens. Because most of the crystals have a similar elongated hexagonal shape, light entering one crystal face and exiting through the opposing face refracts 22 degrees, which corresponds to the radius of the Sun Halo. A similar Moon Halo may be visible during the night. The picture was taken in Gunlock, Utah, USA. A flock of birds was caught by chance in the foreground. Exactly how ice-crystals form in clouds remains under investigation".
Nota: si tratta di un'immagine molto bella, senza alcun dubbio, ma una piccola annotazione va fatta. Vedete il colore del cielo attorno al Sole? Vi sembra naturale? No, ovviamente: non è affatto naturale.
Esso è molto scuro, di colore incerto (grigio), molto simile al cielo di Marte (come si vede nei frames NASA). Ma perchè questo "strano cielo" anche sulla Terra? Diciamo che si tratta di una combinazione di fattori (su tutti il - probabile - filtro/colore usato e la circostanza per cui, scattando foto come questa e quindi sovraesponendo il Sole, automaticamente si rende più scuro tutto il resto del paesaggio).
Morale: se non si vedessero degli uccelli in transito, questa bella immagine potrebbe tranquillamente rappresentare un tramonto (o un'alba) su Marte.
La nostra deduzione è che il fatto di credere a quello che si vede in una fotografia (terrestre, marziana o lunare) e commentarlo, sta diventando sempre più una questione di "Fede" e non - purtroppo - di effettiva oggettività .
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Sun Pillars.jpgLight Pillars' Parade75 visiteDa "NASA - Picture of the Day" del 5 Marzo 2006:"How can an aurora appear so near the ground? Pictured above are not aurora but nearby light pillars, a local phenomenon that can appear as a distant one. In most places on Earth, a lucky viewer can see a Sun-pillar, a column of light appearing to extend up from the Sun caused by flat fluttering ice-crystals reflecting sunlight from the upper atmosphere. Usually these ice ice crystals evaporate before reaching the ground. During freezing temperatures, however, flat fluttering ice crystals may form near the ground in a form of light snow, sometimes known as a crystal fog. These ice crystals may then reflect ground lights in columns not unlike a Sun-pillar. In the above picture, the colorful lights causing the light pillars surround a ice-skating ring in Fairbanks, Alaska".
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Sun pillar.jpgAnother light Sun Pillar61 visitenessun commento
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Sun-Halo.jpg...E Finchè 'l Sole splenderà...53 visitenessun commentoMareKromium
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Sun-ISS.jpgIn the Sunshine...53 visitenessun commentoMareKromium
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SunDogs.jpgSuomi's Sundogs63 visiteWhat's happened to the Sun? Sometimes it looks like the Sun is being viewed through a large lens. In the above case, however, there are actually millions of lenses: ice crystals. As water freezes in the upper atmosphere, small, flat, six-sided, ice crystals might be formed. As these crystals flutter to the ground, much time is spent with their faces flat, parallel to the ground. An observer may pass through the same plane as many of the falling ice crystals near sunrise or sunset. During this alignment, each crystal can act like a miniature lens, refracting sunlight into our view and creating phenomena like parhelia, the technical term for sundogs. The above image was taken during early 2006 February near Helsinki, Finland with a quickly deployed cellular camera phone. Visible in the image center is the Sun, while two bright sundogs glow prominently from both the left and the right. Also visible is the 22° halo also created by sunlight reflecting off of atmospheric ice crystals.
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Sun_Pillar.jpgA light "Sun-pillar" from somewhere in USA84 visiteCaption originale NASA. "Have you ever seen a sun pillar? When the air is cold and the Sun is rising or setting, falling ice crystals can reflect sunlight and create an unusual "column of light". Ice sometimes forms flat, stop-sign shaped crystals as it falls from high-level clouds; air resistance causes these crystals to lie nearly flat much of the time as they flutter to the ground. Then sunlight reflects off crystals that are properly aligned, creating the so-called "Sun-pillar" effect".
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Sun_Pillar_in_blue_and_violet.jpgSun Pillar from Lake Tahoe - Nevada State Park (USA)111 visiteCaption originale NASA: "Sometimes the unknown is beautiful. In 2000 February near Lake Tahoe, Nevada, two amateur photographers noticed an unusual red column of light rise mysteriously from a setting sun. During the next few minutes, they were able to capture the pillar and a photogenic sunset on film. Pictured above, the red column is seen above a serene Lake Tahoe and snow-capped mountains across from Lake Tahoe-Nevada State Park. The mysterious column, they learned later, is a Sun Pillar, a phenomenon where sunlight reflects off of distant falling ice crystals".
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