| Risultati della ricerca nelle immagini - "Aurorae" |
Aurora_Borealis-2.jpgAurora Borealis over Juneau55 visiteCaption NASA:"Some auroras can only be seen with a camera. They are called sub-visual and are too faint to be seen with the unaided eye. The reason is that the human eye only accumulates light for a fraction of a second at a time, while a camera shutter can be left open indefinitely. When photographing an already picturesque scene above Juneau, Alaska, USA, a camera caught green sub-visual aurora near the horizon. Auroras are sparked by energetic particles from the Sun impacting the magnetic environment around the Earth. Resultant energetic particles such as electrons and protons rain down near the Earth's poles and impact the air.
The impacted air molecules temporarily lose electrons, and when oxygen molecules among them reacquire these electrons, they emit green light. Auroras are known to have many shapes and colors". MareKromium
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Aurora_Borealis.jpgAurora Borealis over Chena Lakes55 visiteCaption NASA:"Sometimes, after your eyes adapt to the dark, a spectacular sky appears. In this case, a picturesque lake lies in front of you, beautiful green aurora flap high above you, brilliant stars shine far in the distance, and, for a brief moment, a bright meteor streaks by. This digitally fused breathtaking panorama was captured late last month across one of the Chena Lakes in North Pole, Alaska, USA, and includes the Pleiades open cluster of stars on the image right. The shot is unusual not only for the many wonders it has captured simultaneously, but because lakes this far north tend to freeze and become non-reflecting before a sky this dark can be photographed".MareKromium
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Aurora_Borealis_-_00.jpgOn the shoulder of Giants...56 visitenessun commentoMareKromium
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Aurora_Borealis_-_01.jpgRed Space-Waterfall54 visitenessun commentoMareKromium
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Aurora_Borealis_-_02.jpgPeaceful Morning Sky64 visitenessun commentoMareKromium
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Aurora_Borealis_-_03.jpgAurora in the Northern Skies57 visiteUn frame davvero molto bello ma che, a parere del nostro Esperto di Fotografia, è stato "taroccato" nelle colorazioni. In realtà la nostra non è 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 è stata scomposta nei suoi canali principali.
Comunque sia...una bella immagine!MareKromium
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Aurora_Borealis_-_04.jpgPurple (light's) Rain...54 visiteSi tratta della stessa fotografia mostrataVi nel quadro precedente ma, questa volta, è in "colori autentici" (almeno a nostro parere...).MareKromium
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Aurora_Borealis_-_05.jpgAurora in the Northern Skies56 visitenessun commentoMareKromium
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Chaos-Aurorae_Chaos-PIA08485-PCF-LXTT-1.jpgLandslide in Aurorae Chaos (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)179 visiteImage information: VIS instrument;
Latitude: 6,7° South Lat.;
Longitude: 328,8° East;
Resolution: 18 meter/pixel. MareKromium
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Chaos-Aurorae_Chaos-PIA08485-PCF-LXTT-2.jpgLandslide in Aurorae Chaos (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)177 visiteImage information: VIS instrument;
Latitude: 6,7° South;
Longitude: 328,8° East;
Resolution: 18 meter/pixel. MareKromium
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Chaotic_Terrain-Aurorae_Chaos-PIA14376-PCF-LXTT.jpgFeatures of Aurorae Chaos (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)166 visitenessun commentoMareKromium
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Coronal Aurora - ISS.jpgCoronal Aurora from Space62 visiteOriginal caption:"From the ground, spectacular auroras seem to dance high above. But the International Space Station (ISS) orbits at nearly the same height as many auroras, sometimes passing over them, and sometimes right through them. Still, the auroral electron and proton streams pose no direct danger to the ISS. In 2003, ISS Science Officer Don Pettit captured the green aurora, pictured above in a digitally sharpened image. From orbit, Pettit reported that changing auroras appeared to crawl around like giant green amoebas. Over 300 Km below, the Manicouagan Impact Crater can be seen in northern Canada, planet Earth".
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