| Piú viste - Titan: The "Foggy" Moon |
Titan-PIA11560.jpgTitan (Natural Colors; credits: Lunexit)66 visiteCaption NASA:"The Cassini Spacecraft charts a quartet of dark albedo features on the moon Titan. From upper left to lower right of the image are Fenzal, Aztlan, Aaru and Senkyo.
This view looks toward the Saturn-facing side of Titan; North is up and rotated 16° to the right.
The image was taken with the Cassini Spacecraft narrow-angle camera on June 9, 2009 using a spectral filter sensitive to wavelengths of near-infrared light centered at 938 nanometers. The view was obtained at a distance of approx. 1,2 MKM (such as about 746.000 miles) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 26°.
Image scale is 7 kilometers (4 miles) per pixel".MareKromium
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Titan-PIA12511.jpgTitanian Afterlight (Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)66 visiteCaption NASA:"The Cassini Spacecraft looks toward the dark side of Saturn's largest moon as a circle of light is produced by sunlight scattering through the periphery of Titan's Atmosphere.
A detached, high-altitude global Haze Layer encircles the Planet.
North on Titan is up and rotated 2° to the left.
The image was taken in Visible Blue Light with the Cassini Spacecraft narrow-angle camera on Oct. 9, 2009. The view was acquired at a distance of approx. 1,4 MKM (about 870.000 miles) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 157°.
Image scale is roughly 9 Km (about 5,5 miles) per pixel".MareKromium
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Titan-PIA09846-PCF-LXTT-IPF.jpgTitanian Clouds and Surface Features (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)66 visiteA bright streak of whitish Clouds graces the Northern Skies of the Saturnian moon Titan and this was the second time that the NASA - Cassini Spacecraft's imaging cameras spotted clouds at apporx. 60° of North Latitude (the previous occasion occurred during the observations that were carried out in the month of February of the AD 2007: observations which also led the cameras of the Spacecraft to spot the Dark Lakes - likely filled by Liquid Hydrocarbons - that cover much of the Northern Regions of this fascinating moon). The almost circular, and approx. 400-Kilometer wide Impact Crater Menrva can be seen near center, a little to the left of the Terminator. North on Titan (which, we remind you, is approx. 5150 Km - such about 3200 miles across) is up and rotated 26° to the right.
The image was taken with the NASA - Cassini Spacecraft Narrow-Angle Camera on January 20, 2008, using a combination of Spectral Filters sensitive to Wavelengths of Polarized InfraRed Light centered at 938 and 746 nanometers. The view was acquired at a distance of approximately 1,3 MKM (---> Million KiloMeters), such as about 800.000 miles from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 58°. Image scale is roughly 8 Km (a little more than 5 miles) per pixel. However, it has to be noted that, due to the scattering of light that is caused by the Titanian Hazy Atmosphere, the size of the Surface Features that can be seen and resolved, is a few times larger than the actual (and aforementioned) pixel scale.
This frame (which is an Original NASA - Cassini Spacecraft image published on the NASA - Planetary Photojournal with the ID n. PIA 09846) has been additionally processed and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Cassini Spacecraft and then looked outside, towards the Saturnian moon Titan), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present in the Atmosphere and Surface - where visible - of Titan, each having a different Albedo (---> Reflectivity) and Chemical Composition.
MareKromium
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Titan-Regions-Ganesa_Macula_Region-PIA09176.jpgGanesa Macula65 visiteCaption NASA:"This radar image of Titan shows Ganesa Macula, interpreted as a cryovolcano (ice volcano), and its surroundings. Cryovolcanism is thought to have been an important process on Titan and may still be happening today.
This mosaic was made from images obtained by the Cassini radar mapper on two flybys. The lower part of the image was from the flyby on Oct. 26, 2005, while the upper part was from the Jan. 13, 2007, flyby.
Ganesa macula is the dark circular feature seen on the lower left of the mosaic.
Bright rounded features, interpreted as cryovolcanic flows, are seen towards the top and the right of the mosaic.
This image mosaic was taken in synthetic aperture mode. The resolution of the images is approx. 350 mt (1150 feet). North is toward the top. The image mosaic is about 570 Km (about 354 miles) wide and 390 Km (about 240 miles) high".
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Titan-PIA11610.jpgEclipsed Titan (Natural Colors; credits: Lunexit)65 visiteCaption NASA:"Titan becomes obscured as it moves into eclipse by Saturn. Using a camera filter sensitive to Near-InfraRed light, this image manages to show albedo features on the moon. For a view of Titan in eclipse taken in visible light, see PIA11508.
As it moves into Saturn's shadow, Titan is lit by two sources. Most of the light comes from refracted Sunlight passing through the edge of Saturn's Atmosphere, but Sunlight reflected off the Planet's Rings also reaches the moon.
This view looks toward the Trailing Hemisphere of Titan. North on Titan is up and rotated 28° to the left.
The image was taken with the Cassini Spacecraft narrow-angle camera on Sept. 11, 2009 using a spectral filter sensitive to wavelengths of Near-InfraRed light centered at 938 nanometers. The view was acquired at a distance of approx. 2,5 MKM (such as about 1,6 MMs) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 85°.
Image scale is roughly 15 Km (a little more than 9 miles) per pixel".MareKromium
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Titan-N00200168-752-EB-MF-LXTT-IPF.jpgColourful Titan (Superdefinition and Extremely Enhanced Natural Colors; credits for the additional process. and color.: Elisabetta Bonora and Marco Faccin/Lunar Explorer Italia/Italian Planetary Foundation) 65 visitenessun commentoMareKromium
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Titan-Huygens_Landing_Site-14.jpgHuygens' landing site: best estimate64 visiteIn questa immagine il Centro Controllo Missione di Darmstadt ci fornisce la sua "migliore supposizione" (best estimate) sul punto in cui la Sonda Huygens potrebbe trovarsi adesso. Certo, la certezza assoluta sul punto di impatto non potremo averla mai, a meno che, un domani, non si vada direttamente su Titano a cercarla... Comunque sia, le ultime informazioni ricevute ed elaborate ci dicono che Huygens non è caduta nè dentro un mare od un lago di Titano, nè (propriamente) su una superficie rocciosa. La Sonda ESA, a quanto pare, si è adagiata su un'area fangosa, probabilmente in prossimità di un mare (di idrocarburi?).
Huygens, salvo l'occorrere di eventi imprevisti ed imprevedibili, trascorrerà i prossimi millenni esattamente nel punto dove è caduta, su un mondo affascinante - ancorchè gelido e lontano -, a circa - 180°C. La domanda è: andremo mai a riprenderla?!?...
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Titan-Craters-Guabonito_Crater-PIA08425.jpgGuabonito Crater64 visiteThis image of Saturn's moon Titan from the Synthetic Aperture Radar Instrument on the Cassini spacecraft shows the South-Western area of a feature called Xanadu (bottom right of the image). The area is bright because it reflects the radio wavelengths used to make this radar images and this image was taken on April 30, 2006. Xanadu is one of the most prominent features on Titan and was first seen in ground-based observations. The origin of Xanadu is still unknown, but this radar image reveals details previously unseen, such as numerous curvy features that may indicate fluid flows. Linear dark streaks visible in radar-dark areas are dune fields, also seen in previous radar images.
Near the center of the image is a prominent circular feature, named Guabonito, about 90 Km (about 56 miles) in diameter. It might be an impact crater or a cryovolcanic caldera. If this is an impact structure, the absence of an ejecta blanket suggests that the feature has been highly eroded, like some impact structures on Earth, or has been buried by the dune fields. Other radar-bright areas (top left and top right) appear to be topographically high and might act as obstacles, diverting the dunes around them".
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Titan-Lakes-Unnamed_North_Polar_Lakes-06-PIA08740.jpgTitanian Northern Lakes (6)64 visiteCaption NASA originale:"This Cassini radar image shows two lakes "kissing" each other on the surface of Saturn's moon Titan.
The image has been taken from a fly-by occurred on Sept. 23, 2006, and covers an area of about 60 Km (approx. 37 miles) wide by 40 Km (approx. 25 miles) high.
This pass was primarily dedicated to the ion and neutral mass spectrometer instrument, so although, the volume of radar data was small, scientists were amazed to see Earth-like lakes. With Titan's colder temperatures and hydrocarbon-rich atmosphere, however, the lakes likely contain a combination of methane and ethane, not water.
In this image, near 73° North Latitude and 46° West Longitude, two lakes are seen, each 20 to 25 Km (approx. 12 to 16 miles) across. They are joined by a relatively narrow channel. The lake on the right has lighter patches within it, indicating that it may be slowly drying out as the Northern Summer approaches".
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Titan-Regions-Adiri_Region-PIA08968.jpgAdiri Region64 visiteCaption NASA:"Peering through Titan's thick haze, the Cassini spacecraft glimpses boundaries between bright and dark terrain on the moon's Trailing Hemisphere.
The bright terrain at bottom is in North-Western Adiri.
North on Titan is up and rotated about 15 degrees to the right.
This view was created by combining multiple images taken using a combination of spectral filters sensitive to wavelengths of infrared light centered at 938 and 619 nanometers. Some processing artifacts remain in the finished image, including the two small, dark circles below and right of center.
The images were taken with the Cassini spacecraft narrow-angle camera on May 13, 2007 at a distance of approx. 237.000 Km (about 147.000 miles) from Titan. Image scale is roughly 3 Km per pixel. Due to scattering of light by Titan's hazy atmosphere, the sizes of surface features that can be resolved are a few times larger than the actual pixel scale".MareKromium
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Titan_and_Dione-EB-LXTT-0.jpgA "Mutual Event" in the Space of Saturn: Dione and Titan (an Image-Mosaic in Natural Colors by Elisabetta Bonora - Lunexit Team)64 visiteBellissimo, veramente da lasciare senza fiato. Un Grande plauso per la sempre più brava Amica e Partner di Lunexit, Elisabetta Bonora (a.k.a. "2di7").MareKromium
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Titan-W00064419-421-FalseColors-MF-LXTT.jpgTitanian "Aura" (False Colors; credits for the additional process. and color.: Dr Marco Faccin - Lunexit Team)64 visitenessun commentoMareKromium
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