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Aurora Borealis~0.jpgAurora Borealis over North Dakota84 visiteDa "NASA - Picture of the Day" del 20 Novembre 2005:"This aurora was a bit of a surprise. For starters, on this Friday morning in August 2002, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. In the above image, captured from North Dakota, USA, a picket fence of green rays stretches toward the horizon. Mirroring the green rays is a red band, somewhat rare in its own right. Lights from the cities of Bismarck and Mandan are visible near the horizon. Large sunspot groups indicate that activity from an active Sun is relatively likely, possibly causing other streams of energetic particles to cascade onto the Earth and so causing more auroras".Nov 20, 2005
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Mandelbrot Set.jpgThe "Mandelbrot Set"1126 visiteA fractal is a geometric object which is rough or irregular on all scales of length, and so which appears to be 'broken up' in a radical way. Some of the best examples can be divided into parts, each of which is similar to the original object. Fractals are said to possess infinite detail and some of them have a self-similar structure that occurs at different levels of magnification. In many cases, a fractal can be generated by a repeating pattern, in a typically recursive or iterative process. The term fractal was coined in 1975 by Benoît Mandelbrot, from the Latin fractus or "broken". Before Mandelbrot coined his term, the common name for such structures (the Koch snowflake, for example) was "Monster Curve".
Fractals of many kinds were originally studied as mathematical objects and Fractal Geometry is the branch of mathematics which studies the properties and behaviour of fractals. It describes many situations which cannot be explained easily by classical geometry, and has often been applied in science, technology, and computer-generated art. The conceptual roots of fractals can be traced to attempts to measure the size of objects for which traditional definitions based on Euclidean geometry or calculus fail.Nov 16, 2005
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Coscientia.jpgCoscientia202 visite"...Sublata Conscientia, iacent omnia..."
(Cicerone)Nov 06, 2005
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Mars-Earth.jpgAn old Sunset over the Alps... (Natural Colors - Credits: Dr Paolo C. Fienga/LXTT/IPF) 12126 visiteUna fotografia ingannevole: si tratta di un tramonto terrestre; non sono stati usati filtri di sorta: i colori sono assolutamente genuini. In origine questa immagine era stata rubricata con un seriale NASA "anomalo" il quale faceva pensare a frames Spirit e/o Opportunity "pirata".
La veritā č che si tratta di una (semplice) interpretazione della realtā: a volte Marte sembra la Terra ed a volte la Terra sembra Marte: nessun trucco e nessun inganno. Solo la Natura...Ott 27, 2005
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The_Floodway_2005.jpgThe Flood-Way (by Michael Wirtz)2944 visiteIncontro fra paesaggio reale (Filippine) e fantasia (il Cielo)Ott 27, 2005
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Il Volo~0.jpgIl Volo203 visiteTecnica realizzativa: mista (acquarelli e china)
Dimensioni: 100 x 70
Realizzato su: cartoncino
Ott 27, 2005
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Moon and Companions~0.jpgMoon, Mars and Venus150 visiteDa "NASA - Picture of the Day" del 19 Ottobre 2005:"On another October 19, in 1899, a 17 year-old Robert Goddard climbed a cherry tree on a beautiful autumn afternoon in Worcester, Massachusetts. Inspired by H.G. Wells' "War of the Worlds" and gazing out across a meadow, young Goddard imagined it would be wonderful to make a device that had the possibility of ascending to Mars. Forever more he felt his life had a purpose and in the following years his diary entries record October 19th as "Anniversary Day", the anniversary of his ascent into the cherry tree. By 1926 he had designed, built, and flown the world's first liquid fuel rocket. Mars is just visible through the trees at the lower right in this dramatic sky view that also features the Moon and Venus - all visited by liquid fuel rockets constructed on principles developed by Goddard".Ott 19, 2005
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Aurora_Borealis-Coronal_Aurora-sep11aurora_moussette_f.jpgNorthern Lights over Canada71 visiteSo far, the Aurora Borealis - or "Northern Lights" - have made some remarkable visits to September's Skies. The reason, of course, is the not-so-quiet Sun. In particular, a large solar active region now crossing the Sun's disk has produced multiple, intense flares and a large Coronal Mass Ejection (CME) that triggered wide spread auroral activity just last weekend. This colorful example of spectacular curtains of aurora was captured with a fish-eye lens in skies over Quebec, Canada, on September 11, 2005.
Also featured is the planet Mars, the brightest object above and left center. Seen near Mars (just below and to the right) is the tightly knit Pleiades star cluster.
Although they can appear to be quite close, the Northern Lights actually originate at extreme altitudes, 100 Km or so above the Earth's surface.Set 16, 2005
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Richat_Crater.jpgRichat Crater190 visiteEd ecco il Richat Crater, a colori, che ci rammenta - caso mai ce ne fosse bisogno - che la "nostra" Terra č, in fondo, come Venere, come Marte e come infiniti altri Corpi Celesti dell'Universo.
Il "messaggio nella bottiglia" che ci viene consegnato attraverso questa splendida immagine del cratere Richat dice, a nostro parere, solo queste poche parole:
"Il nostro Pianeta non č e noi non siamo un'eccezione.
Il nostro Pianeta non č e noi non siamo diversi dal resto del Sistema Solare.
Il nostro Pianeta non č e noi non siamo diversi dal resto dell'Universo.
La Terra NON E' UNICA e noi NON SIAMO UNICI".Set 14, 2005
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Moon and Companions.jpgMoon & Friends, from Great Salt Lake - Utah (USA)174 visiteDa "NASA - Picture of the Day" del 13 Settembre 2005:"(...) This busy quadruple 'coincidence sky' was visible last week all over the World. The easiest object to spot is the crescent Moon, which is easily the brightest sky orb in the above image. Venus is the highest Planet in the sky, with Jupiter to its right. The bright star Spica completes the quadruple just below Venus. The 'streak' on the far right is an airplane. (...)".
Nota: osservate lo "streak in the sky" lasciato dall'aeroplano (come la NASA stessa precisa) e poi provate a riguardare l'immagine Spirit relativa allo "Streak in the Sky" che alla NASA (ed anche in Italia, grazie al Corsera ed al Dr Caprara) venne immediatamente risolto come "vecchia sonda che precipita" (cfr.: "Another Spirit in the Sky?!?" - Sez. "Mars Spirit Anomalies and Maps"). Bene, allora se tanto ci dā tanto, vorremmo chiedere alla NASA "quale sonda - ripresa dal Sig. Wilson - stava precipitando nei cieli dello Utah, la sera del 6 Settembre u.s.?".
E scusateci l'ironia...Set 13, 2005
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Moon River.jpgThe Moon over St. Lawrence River127 visiteDa "NASA - Picture of the Day" del 9 Settembre 2005:"Shortly after sunset on September 6th, sky gazers around the world were treated to a lovely crescent Moon in western skies - joined by bright planets Venus and Jupiter.
In this colorful telephoto view from near Quebec City, Canada, the Moon is nestled just above the wide St. Lawrence River. Lights on the horizon are along the river's southern shore. Also known as the evening star, Venus is at the upper left and Jupiter at the upper right, while another prominent celestial beacon, Spica, can be seen shining through the twilight below Venus.
Spica, actually a very close pair of hot blue stars some 260 LY away, is the brightest star in the constellation Virgo".Set 09, 2005
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Sunset-PCF-00.jpgSunset from Legnano (Natural Colors; credits: Dr Paolo C. Fienga)205 visitenessun commentoSet 08, 2005
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