| Piú votate - The Universe Inside |
The_Moon~0.jpgThe Moon55 visitenessun commentoMareKromium
(8 voti)
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Meteor_Strike.jpgBetween Cosmic Clouds... (by Victor van Wulfen)54 visitenessun commentoMareKromium
(8 voti)
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EyesInTheSky.jpgEyes in the Sky54 visitenessun commentoMareKromium
(8 voti)
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TheGreyIllusion.JPGThe "Same Color Illusion"55 visiteDa "NASA - Picture of the Day" del giorno 4 Ottobre 2009:"Are square A and B of the same color?
They are.
The above illusion, called the "Same Color Illusion", illustrates that purely human observations in science may be ambiguous or inaccurate. Even such a seemingly direct perception as relative color. Similar illusions exist on the sky, such as the size of the Moon near the Horizon, or the apparent shapes of astronomical objects. The advent of automated, reproducible, measuring devices such as CCDs have made science in general and astronomy in particular less prone to, but not free of, human-biased illusions".MareKromium
(8 voti)
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OPP-SOL1961-GB1~0.jpgSMILE! (by Dr Gianluigi Barca)64 visiteCandid Camera on Mars? CERTO!
Perchè un sorriso, a volte, è più che necessario: è ESSENZIALE!!!
Un abbraccio e Complimenti - as usual - al nostro Dr Barca (Big "G").MareKromium
(8 voti)
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Maybe.jpgHeisenberg's Uncertainty (by Marco Faccin)84 visitenessun commentoMareKromium
(8 voti)
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MeteorMilkyway_rowell.jpgTemporary Sky54 visitenessun commentoMareKromium
(8 voti)
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Minds-MF.jpgA Beautiful Mind (by Marco Faccin)64 visitenessun commentoMareKromium
(8 voti)
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Sands-20070801_Spirit-1.jpgWorking in the Sand...56 visitenessun commentoMareKromium
(8 voti)
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Walhalla-070912_8930-39.jpgWalhalla57 visitenessun commentoMareKromium
(8 voti)
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WarmPlanetColdStar-PIA11980.jpgWarm Planet, Cold Star60 visiteThis artist's conception shows a young, hypothetical planet around a cool star. A soupy mix of potentially life-forming chemicals can be seen pooling around the base of the jagged rocks. Observations from NASA's Spitzer Space Telescope hint that planets around cool stars — the so-called M-dwarfs and Brown dwarfs that are widespread throughout our Galaxy — might possess a different mix of life-forming, or prebiotic, chemicals than our young Earth.
Life on our Planet is thought to have arisen out of a pond-scum-like mix of chemicals. Some of these chemicals are thought to have come from a planet-forming disk of gas and dust that swirled around our young Sun. Meteorites carrying the chemicals might have crash-landed on Earth.
Astronomers don't know if these same life-generating processes are taking place around stars that are cooler than our Sun, but the Spitzer observations show their disk chemistry is different. Spitzer detected a prebiotic molecule, called Hydrogen Cyanide (Cianuro di Idrogeno), in the disks around yellow stars like our Sun, but found none around cooler, less massive, reddish stars. Hydrogen Cyanide is a carbon-containing, or organic compound. Five Hydrogen Cyanide molecules can join up to make Adenine — a chemical element of the DNA molecule found in all living organisms on Earth.MareKromium
(8 voti)
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Almahata-Sitta15_2048.jpgAlmahata Sitta 1579 visiteDa "NASA - Picture of the Day", del giorno 28 Marzo 2009:"Small Asteroid 2008 TC3 fell to Earth at dawn on October 7, 2008, tracking through the skies over the Nubian Desert in Northern Sudan. That event was remarkable because it was the first time an asteroid was detected in space before crashing into planet Earth's Atmosphere.
It was generally assumed the asteroid itself had completely disintegrated to dust. But, based on satellite and ground observations of the atmospheric impact event, Dr. Mauwia Shaddad of the University of Khartoum, aided by Dr. Peter Jenniskens of the SETI Institute and NASA Ames Research Center, led an expedition of students and staff to the area, combing the desert for surviving fragments.
On December 6, 2008, 2 hours after their search began, the first meteorite was found. The team ultimately collected some 280 small meteorites, now called Almahata Sitta, with a total mass of about 5 kilograms -- the first material recovered from a known asteroid. In stark contrast to the lighter-colored stones, the black fragment in the picture is Almahata Sitta meteorite number 15. About 4 centimeters in diameter, it is seen as it came to rest on the desert floor".
Nota Lunexit: la fotografia, sebbene suggestiva, presenta - a nostro parere - delle notevoli incongruenze di texture e colore. In altre parole, sembra più un image-composite che un vero e proprio single still.
Abbiamo quindi leggermente modificato la colorizzazione del frame, adattando il suolo al colore tipico della superficie del Deserto Sudanese (la "fotografia" originale sembra essere parecchio sovrasaturata) ed il colore blu del cielo è stato leggermente abbassato di tonalità ed intensificato (così ricreando - in visione - le condizioni atmosferiche tipiche dei cieli che sovrastano regioni desertiche in cui l'Atmosfera è estremamente secca e l'Opacità - Atmosferica - bassissima o nulla).MareKromium
(8 voti)
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