| Piú viste - The Universe Inside |
Autumn_s Moon.jpgLuna d'Autunno86 visitenessun commento
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In The Sunset.jpgRed, red Sunset...86 visitenessun commento
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Aurora_Borealis_-_03.jpgAurora in the Northern Skies86 visiteUn frame davvero molto bello ma che, a parere del nostro Esperto di Fotografia, stato "taroccato" nelle colorazioni. In realt la nostra non una "conclusione scientifica" quanto, piuttosto, il frutto di una sensazione basata sia sull'esperienza (le Aurorae "rosse" sono rare, quelle "fucsia e rosa"...di fatto inesistenti...), sia sull'incoerenza cromatica dei particolari della fotografia una volta che essa stata scomposta nei suoi canali principali.
Comunque sia...una bella immagine!MareKromium
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The_Sun.jpgPartial Eclipse86 visiteCaption NASA:"On Monday, March 19, 2007, shortly before the Equinox, locations in Asia and the Arctic were favoured by the New Moon's shadow during a partial Solar Eclipse. Although the view from Goa, India, found the eclipsed Sun near the horizon, photographer Joerg Schoppmeyer was still able to capture this lovely image, combining celestial with terrestrial silhouettes.
The next eclipse season will begin in late August this year, featuring a total Lunar Eclipse on August 28, and another partial solar eclipse on September 11. Compared to the March 19th eclipse, the September 11th eclipse will be seen on the other side of our fair planet, from parts of South America and Antarctica".
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Under_The_Stars.jpgOld Faithful...86 visite
Caption NASA:"You don't have to be at Yellowstone to see a sky this beautiful, but it helps. Only at Yellowstone National Park in Wyoming, USA, would you see the picturesque foreground of the famous "Old Faithful Geyser" erupting in front an already picturesque sky. Old Faithful Geyser, visible in the foreground, is seen propelling a stream of hot water over 30 mt up in the air. This happens predictably for a few minutes about every 90 minutes. Also predictable are the brightest orbs that popular the nighttime sky, although those visible at any one time keep changing. Visible far in the background sky of this mid-June image are the plane of our Milky Way Galaxy on the left, and the bright planet Jupiter on the right. Jupiter is the brightest celestial object in the entire image. Old Faithful has been erupting at least since the late 1800s".
Nota: siamo curiosi di vedere quando la NASA "ipotizzer" (ironizziamo, poich le evidenze fotografiche in nostro possesso sono gi innumerevoli) che alcuni fenomeni attualmente catalogati come "minicicloni" o "Dust Devils" (DD) sono, in realt (ed in maniera particolare nelle aree presso-polari), dei geysers.
Geysers che, a volte, eruttano fango e ghiaccio e, altre volte - forse - acqua calda ed idrocarburi.
Staremo a vedere...MareKromium
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CosmicRays.jpgCosmic Rays86 visiteWhere do Cosmic Rays come from? A major step toward answering this century old question may have just come in from the Auger Observatory Project, the world's premier Cosmic Ray Observatory. That high energy fundamental particles are barreling through the Universe has been known for about a century.
Because ultra high energy cosmic rays are so rare and because their extrapolated directions are so imprecise, no progenitor objects have ever been unambiguously implied. New results from Auger, however, indicate that 12 of 15 ultra high energy cosmic rays have sky directions statistically consistent with the positions of nearby active galactic nuclei. These galactic centers are already known to emit great amounts of light and are likely powered by large Black Holes. The Auger results also indicate that the highest energy cosmic rays are protons, since the electric charge of higher energy nuclei would force the Milky Way Galaxy's magnetic field to deflect and effectively erase progenitor source direction. MareKromium
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Sands-20070801_Spirit-1.jpgWorking in the Sand...86 visitenessun commentoMareKromium
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EyesInTheSky.jpgEyes in the Sky86 visitenessun commentoMareKromium
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Moon and Pleiades.jpgOld Moon...85 visiteDa "NASA - Picture of the Day" del 29 Giugno 2006:"An old crescent Moon shares the Eastern Sky over Menton, France, with the Sister Stars of the Pleiades cluster in this early morning skyscape recorded just last Friday, June 23rd. (Bright Venus was also near the Eastern horizon, but is not pictured here.) Astronomical images of the well-known Pleiades often show the cluster's alluring blue reflection nebulae, but they are washed out here by the bright moonlight. Still, while the crescent Moon is overexposed, surface features can be seen on the dim lunar night side illuminated by earthshine - light from sunlit planet Earth. Of course, you can spot a young crescent Moon in the early evening sky tonight.
Having left the Pleiades behind, a lovely lunar crescent now appears in the West, lining up with planets Mars, Saturn and Mercury along the Solar System's Ecliptic Plane".
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FL-Anticrepuscolar Rays.jpgInfinite85 visiteCaption NASA originale:"(...) Pictured above are anticrepuscular rays.
To understand them, start by picturing common crepuscular rays that are seen any time that Sunlight pours though scattered clouds. Now although Sunlight indeed travels along straight lines, the projections of these lines onto the spherical sky are great circles. Therefore, the crepuscular rays from a setting (or rising) Sun will appear to re-converge on the other side of the sky.
At the anti-solar point 180 around from the Sun, they are referred to as anticrepuscular rays (...)".
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Aurora_Borealis_-_05.jpgAurora in the Northern Skies85 visitenessun commentoMareKromium
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Rising_Moon.jpgRising Moon85 visiteCaption NASA:"What's happening to the Moon? Drifting around the Earth in 2006 July, astronauts from the International Space Station (ISS) captured a crescent Moon floating far beyond the horizon. The captured above image is interesting because part of the Moon appears blue, and because part of the moon appears missing.
Both effects are created by the Earth's atmosphere. Air molecules more efficiently scatter increasingly blue light, making the clear day sky blue for ground observers, and the horizon blue for astronauts.
Besides reflecting sunlight, these atmospheric molecules also deflect moonlight, making the lower part of the Moon appear to fade away. As one looks higher in the photograph, the increasingly thin atmosphere appears to fade to black".
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