| Piú votate - Artistic Views of the Solar System |
Mars-B.jpgMars, SOME time ago...100 visitenessun commento
(10 voti)
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032-OPP-SOL209.jpgOver the Walls of Endurance... (2)93 visiteImmagine in cui il Sole, ora, esprime un terzo in meno della luminosità percepibile dalla Terra. Notate una differenza?
(10 voti)
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Kuiper_s Belt.jpgRelationship of the Kuiper's Belt to the Oort's Cloud89 visiteThis illustration shows that the Kuiper Belt is shaped like a disk (see inset diagram) and resides within the shell-like structure of the Oort Cloud. Located on the outskirts of the Solar System, the Kuiper Belt is a "junkyard" of countless icy bodies left over from the Solar System's formation. The Oort Cloud is a vast shell of billions of comets.
The inset diagram compares Pluto's orbit with a Kuiper Belt binary object called 1998 WW31. The Kuiper Belt [the fuzzy disk] extends from inside Pluto's orbit to the edge of the Solar System.
(10 voti)
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Enceladus-PIA07724.jpgEnceladus, Great Britain and Northern France140 visiteSaturn's moon Enceladus is only 505 Km (approx. 314 miles) across, small enough to fit within the length of the United Kingdom, as illustrated here. The intriguing icy moon also could fit comfortably within Arizona or Colorado.
(10 voti)
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Spirit2-19-DDM-04-Rover-A113R1.jpgI like to "roll" on Mars!!!78 visiteUn'interpretazione "artistica" (ma fortemente legata alla realtà fattuale) del Rover Spirit mentre cammina (anzi: rolls...) sulla superficie di Gusaev Crater - Marte.
E' un disegno, naturalmente, ma estremamente bello e suggestivo il quale ci ricorda, come d'altronde noi abbiamo già fatto tantissime volte, che la Scienza non è solo calcolo e razionalità: la Scienza, in quanto tale, è Arte!...
(10 voti)
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s going to Titan-IMG000616-br500.jpgDown to Titan!82 visiteCaption NASA originale:"This artist's conception of the Cassini orbiter shows the Huygens probe separating to enter Titan's atmosphere. After separation, the probe drifts for about 3 weeks until reaching its destination, Titan. Equipped with a variety of scientific sensors, the Huygens probe will spend 2-2,5 hours (maybe more) descending through Titan's dense, murky atmosphere of nitrogen and carbon-based molecules, beaming its findings to the distant Cassini orbiter overhead. The probe could continue to relay information for up to 30 minutes after it lands on Titan's frigid surface, after which the orbiter passes beneath the horizon as seen from the probe".
(10 voti)
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Huygens to Titan-IMG001244-br500.jpgHuygens probe's going to Titan107 visiteAn artist's concept of the European Space Agency's Huygens Probe en route to Titan after release from the NASA Cassini orbiter.
(10 voti)
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Landing on Titan.jpgLanding on Titan114 visiteBecause it's in a deep freeze state, Titan's atmosphere is thought to contain chemicals similar to those found on Earth's early days. Data from the Huygens probe combined with Cassini's measurements may offer clues about how life began on Earth.
(10 voti)
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Venus fly-by.jpgCassini-Huygens during the Venus fly-by76 visitenessun commento
(10 voti)
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Titan_s Rain~0.jpgTitan's "Rain"...88 visiteDa "NASA - Picture of the Day" del 2 Agosto 2006:"Might it rain cold methane on Saturn's Titan? Recent analyses of measurements taken by the Huygen's probe that landed on Titan in 2005, January, indicate that the atmosphere is actually saturated with methane at a height of about 8 Km. Combined with observations of a damp surface and lakes near the Poles, some astrobiologists conclude that at least a methane drizzle is common on parts of Titan. Other astrobiologists reported computer models of the clouded moon that indicate that violent methane storms might even occur, complete with flash floods carving channels in the landscape. The later scenario is depicted in the above drawing of Titan. Lighting, as also depicted above, might well exist on Titan but has not been proven. The findings increase speculation that a wet Titanian surface might be hospitable to unusual forms of life".
Attenzione all'ultima frase: "Queste scoperte fanno crescere (la validità) di una ipotesi speculativa secondo cui la superficie di Titano, laddove effettivamente umida, potrebbe essere idonea ad ospitare "inusuali" forme di Vita".
Il significato e la portata di questa frase sono evidenti e di valore storico, ma c'è una domanda che ci incuriosisce e, in fondo, un pò ci turba: cosa intende la NASA quando parla di "unusual life forms"?...
(9 voti)
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Earth From Mars.jpgMy "Day", your "Night"113 visiteThough Earthlings will be able to get a good look at Mars during close approach, NASA's 2 Rovers on Mars will not be able to see Earth. That's because at the moment, Earth is on the daytime side of Mars. As shown in the top half of this artist's rendering, when it's nighttime on Earth, it's daytime on Mars. After Earth passes Mars, the Rovers will be able to see the sunlit side of Earth again just before dawn. The bottom half of this illustration shows what the Rovers would see if they looked toward Earth.
(9 voti)
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Flash-PIA02108.jpgFlash!!!108 visiteThis image shows a flash produced in a laboratory by a high-velocity bead slamming into dust. Though the flash itself can't be resolved, its brilliant effects can be seen in this three-second time exposure. Scientists say that the collision between Deep Impact's Impactor and comet Tempel 1 may produce a similar flash.
This flash occurred when a quarter-inch sphere smashed into powdered dust at a speed of 6,4 Km-per-second (about 4 miles-per-second).
Even though the actual flash lasted less than 50 millionths of a second, the camera recorded the hot debris in the impact crater (center) and the streaking ejecta.
This experiment was performed at NASA's Ames Research Center, Moffett Field, Ca.
(9 voti)
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