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ZW-The Moon and Jupiter.jpgMoon and Jupiter136 visiteUn'immagine amatoriale davvero eccellente che ci arriva dalla cittadina di Atmore - Alabama, USA - e pubblicata sul Sito NASA - Picture of the Day del giorno 9 Dicembre 2004.
Ben visibili, accanto a Giove, guardando il versante superiore della Luna (e, per l'esattezza, quella sua parte che ci appare debolmente illuminata a causa del "chiaro di Terra"), riusciamo a vedere due "Satelliti Galileiani": Ganymede (quello più prossimo a Giove) e Callisto.
Complimenti al Sig. Westlake per l'immagine!Dic 09, 2004
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Aurora Borealis.jpgAurora over Wisconsin115 visiteLo "spettacolo" delle Aurore Boreali che stanno manifestandosi un pò ovunque in Nord America non accenna a diminuire: questa si è verificata nel Wisconsin. Ecco la caption originale da "NASA - Picture of the Day" del 17 Novembre 2004:"The auroral displays of the past week are being reported as some of the most beautiful in memory. In particular, impressive auroral bands fanned out over much of eastern North America after sunset on November 8. The multicolored aurora pictured above was caught reflecting in one of the many small lakes in central Wisconsin near that time. Continued solar activity might create more aurora visible over the next few nights as the Leonids meteor shower peaks". Non comprendiamo, a dire il vero, la curiosa relazione implicita che ci sembra essere stata fatta tra il verificarsi di queste Aurore ed i prossimo picco delle Leonidi.
Forse non abbiamo capito bene o magari ci sta semplicemente sfuggendo qualcosa...Nov 17, 2004
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Moon, Venus and Jupiter from Earth.jpgThe Moon, Venus and Jupiter from Shiraz (Iran)171 visiteDa "NASA - Picture of the Day" del giorno 13.11.2004: " Early morning risers around the world have enjoyed the sight of bright planets in this week's predawn skies - further enhanced by the celestial spectacle of the waning crescent Moon. From some locations the Moon was seen to pass in front of Jupiter or Venus, a lunar occultation. Recorded near sunrise on November 10th from Shiraz, Iran, this eastern horizon view finds Jupiter (top) and a brilliant Venus in line with the Moon, a lovely conjunction of the three brightest objects in the night sky. Although the Moon has now fallen out of the early morning scene, Venus and Jupiter (along with a much fainter Mars) still precede the rising Sun above the eastern horizon". Una fotografia molto simile a quella ripresa dalla Turchia (Bursa) - già pubblicata nella Sezione dedicata a Giove - la quale ci mostra e dimostra che non è poi così difficile "cristallizzare" un particolare (e suggestivo) momento del Cielo.Nov 13, 2004
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Aurora_Borealis-Coronal_Aurora.jpgCoronal Aurora near Warrensbourg - Missouri (USA)82 visiteIn relazione a quanto detto e scritto solo pochi giorni fa, ecco una nuova Aurora la quale, oltre ad essere stata particolarmente intensa (come potete ben vedere), è accaduta ad un latitudine che di Polare o presso-Polare non ha proprio nulla. La NASA dice che è un fenomeno inusuale ma "normale", vista l'attività solare di questi giorni. Permetteteci, a questo riguardo, una battuta: è proprio il fatto che sia la NASA a dire di non preoccuparci che ci fa preoccupare... EccoVi il commento originale da "NASA - Picture of the Day" del giorno 12.11.2004: "(...) Amazing! Unbelievable!, The best I've ever seen! ... They aren't talking about a movie, though. Instead, even casual sky critics are remarking on November's stunning auroral displays, visible with surprising intensities well beyond the confines of high latitudes where auroral activity is normally observed (...)". Vedete?!? Entusiasmo, eccitazione, linguaggio più da show che da Scienza e dintorni: è il nuovo corso della NASA...Nov 12, 2004
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Aurora_Borealis-Coronal_Aurora-1.jpg"Auroral Corona" from l'Observatoire de la Découverte in Val Belair near Quebec - Canada81 visiteDa "NASA - Picture of the Day" del 9 Novembre 2004: "...This fisheye picture captures a particularly active and colorful 'Auroral Corona' that occurred on November 7, 2004 (...) The above aurora has an unusually high degree of detail, range of colors and breadth across the sky. The vivid green, red, and blue auroral colors are likely caused by high atmospheric oxygen and hydrogen reacting to incoming electrons. The trigger events were magnetically induced explosions on the Sun from sunspot region 696 over the past few days. Continued activity from this active solar region could mean more auroras visible to northern observers over the next few days. Early in the morning but far in the background, planets, stars and the Moon will be simultaneously putting on their own show".
Una piccola (nostra) nota di commento: dietro la vivace bellezza dell'immagine ed i "romantici" commenti, c'è un nuovo incremento dell'attività solare in un periodo in cui, invece, il nostro Sole è usualmente calmo. Nov 09, 2004
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ZZ-Jupiter and Venus.jpgJupiter and Venus in the dawn102 visiteUna spettacolare congiunzione Giove-Venere del Novembre 2004, come ripresa, pochi minuti prima dell'alba, nei cieli della Turchia (la città che appare nello sfondo è Bursa).
Si tratta di una fotografia amatoriale - a posa breve - ottenuta con estrema semplicità e senza l'ausilio - a quanto ci è dato vedere - di particolari accortezze tecniche. Nov 08, 2004
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ZZ-Venus from Space.jpgVenus from the Earth's orbit132 visiteCaption NASA originale:"Venus can appear as a brilliant evening star. Besides the Sun and Moon, Venus is the brightest object visible in Earth's sky. Because it is closer to the Sun than Earth, Venus never strays far from the Sun in its apparent position and is seen during the year as either a bright morning or evening star. This beautiful sunset imaged from low earth orbit by the Atlantis space shuttle crew in May 1989 also reveals the planet Venus blazing above Earth's horizon. It is a fitting image for this mission and crew. It was recorded following the successful release of the robot Venus-explorer Magellan, the first planetary probe to be deployed from a space shuttle".Ott 16, 2004
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Sun pillar.jpgAnother light Sun Pillar89 visitenessun commentoOtt 16, 2004
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Sundogs.jpgThe "Sundogs", again149 visiteCaption NASA originale da "NASA - Picture of the Day" del 23 Agosto 1999 :"What if you woke up one morning and saw more than one Sun in the sky? Most probably, you would be seeing Sundogs, extra-images of the Sun created by falling ice-crystals in the Earth's atmosphere. As water freezes in the 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 parhelia, the technical term for sundogs. Sundogs were photographed here in a cloudy sky above the Very Large Array of radio telescopes. A bright Sundog is visible on the far right, and a dim one on the far left. Ice-crystals can create other strange illusions of the Sun and Moon including halos and pillars".Ott 15, 2004
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Sun_Pillar_in_blue_and_violet.jpgSun Pillar from Lake Tahoe - Nevada State Park (USA)127 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".Set 15, 2004
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ZA-Green flash from the Sun (2).jpgA "Green Flash" from the Sun (Portugal)97 visiteCaption NASA originale: "Many think it is just a myth. Others think it is true but its cause isn't known. Adventurers pride themselves on having seen it. It's a green flash from the Sun. The truth is the green flash does exist and its cause is well understood. Just as the setting Sun disappears completely from view, a last glimmer appears startlingly green. The effect is typically visible only from locations with a low, distant horizon and lasts just a few seconds".Set 14, 2004
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Sun_Pillar.jpgA light "Sun-pillar" from somewhere in USA100 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". Set 09, 2004
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