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![Nome del file=Miranda.jpg
Dimensione del file=67KiB
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Aggiunta il=Ago 02, 2022 Miranda.jpg](albums/userpics/10060/small_Miranda.jpg)
Miranda.jpgMiranda (full disk)108 visiteLe "Verona Rupes" sono in basso, leggermente alla Dx dell'Osservatore.MareKromium
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![Nome del file=Miranda-Verona_Rupes.jpg
Dimensione del file=105KiB
Dimensioni=1002x1016
Aggiunta il=Dic 11, 2020 Miranda-Verona_Rupes.jpg](albums/userpics/10060/small_Miranda-Verona_Rupes.jpg)
Miranda-Verona_Rupes.jpgVerona Rupes139 visiteCaption NASA:"Could you survive a jump off the tallest cliff in the Solar System?
Quite possibly. Verona Rupes on Uranus' moon Miranda is estimated to be 20 kilometers deep - ten times the depth of the Earth's Grand Canyon. Given Miranda's low gravity, it would take about 12 minutes for a thrill-seeking adventurer to fall from the top, reaching the bottom at the speed of a racecar -- about 200 Km-per- hour.
Even so, the fall might be survivable given proper airbag protection. The featured image of Verona Rupes was captured by the passing Voyager 2 Robotic Spacecraft in 1986.
How the giant cliff was created remains unknown, but is possibly related to a large impact or tectonic surface motion". MareKromium
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![Nome del file=Titania-PIA01978-PCF-LXTT-IPF.jpg
Dimensione del file=145KiB
Dimensioni=1018x2990
Aggiunta il=Set 08, 2013 Titania-PIA01978-PCF-LXTT-IPF.jpg](albums/userpics/10060/small_Titania-PIA01978-PCF-LXTT-IPF.jpg)
Titania-PIA01978-PCF-LXTT-IPF.jpgOn the Limb of Titania (Possible Absolute Natural Colors; credits for the additional process. and color. Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)80 visiteLike their semi-divine namesakes, Dione's twin Impact Craters Romulus and Remus (just above-right of the center) stand together while Dido, the larger Impact Crater showing a magnificent and impressive Central Peak, lies to the South/East, on the lower left Limb of Dione and almost half-way on top of the Terminator. The lit Terrain seen here is on the Saturn-facing Hemisphere of Dione and North is up.
The image was taken in Visible Light with the NASA - Cassini Spacecraft Narrow-Angle Camera on April 28, 2013. The view was obtained at a distance of approximately 870.000 miles (such as a little more than 1,4 Million KiloMeters) from Dione and at a Sun-Dione-Cassini Spacecraft, or Phase, Angle of 77°. Image scale is roughly 5 miles (a little more than 8 Km) per pixel.
This frame (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 17126) has been additionally processed, contrast enhanced, magnified to aid visibility of the Surface details and then colorized, according to an educated guess carried out by Dr Paolo C. Fienga/LXTT/IPF, in what they should be its 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 Dione), 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 on the Surface of Dione, each having a different Albedo (---> Reflectivity) and Chemical Composition.
Note: it is possible (but we, as IPF, have no way to be one-hundred-percent sure of such a circumstance), that the actual luminosity of Dione - as it is in this frame - would appear, to an average human eye, a little bit lower than it has been shown (or, better yet: interpreted) here.MareKromium
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![Nome del file=Miranda-PIA00042-PCF-LXTT-IPF.jpg
Dimensione del file=168KiB
Dimensioni=1500x2048
Aggiunta il=Set 08, 2013 Miranda-PIA00042-PCF-LXTT-IPF.jpg](albums/userpics/10060/small_Miranda-PIA00042-PCF-LXTT-IPF.jpg)
Miranda-PIA00042-PCF-LXTT-IPF.jpgMiranda's Southern Hemisphere (Possible Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)75 visiteThis image-mosaic of the Uranian moon Miranda was taken by the NASA - Voyager 2 Spacecraft on January 24, 1986, from a distance of approx. 147.000 Km (such as about 91.287 miles). This image-mosaic was constructed from images taken through the Spacecraft's Narrow-Angle Camera's Green, Violet and UltraViolet Filters.
Miranda, just about 480 Km (such as approx. 299 miles) across, is the smallest of Uranus' five Major natural satellites. Miranda's Regional Geologic Provinces are shown very well in this view of its Southern Hemisphere, imaged at a resolution of roughly 2,7 Km (such as 1,67 miles) per pixel. The dark- and bright-Banded Region with its curvilinear traces, covers about half of the frame. Higher-resolution pictures taken some time later showed many Fault Valleys and Ridges, all parallel to these "Bands". Near the Terminator Line (on the right - Dx), another system of Ridges and Valleys abuts the Banded Terrain; furthermore, many Impact Craters pockmark the Surface of Miranda all over this Region. The largest of these Craters are about 30 Km (approx. 18,63 miles) in diameter and many more of them lie in the range of 5 to 10 Km (such as from 3,1 to 6,2 miles) in diameter.
This frame (which is an Original NASA - Voyager 2 Spacecraft Natural Color image-mosaic published on the NASA - Planetary Photojournal with the ID n. PIA 00042) has been additionally processed, contrast enhanced, magnified to aid visibility of the Surface details and then re-colorized, according to an educated guess carried out by Dr Paolo C. Fienga/LXTT/IPF, in what they should be its Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Voyager 2 Spacecraft and then looked outside, towards the Uranian moon Miranda), 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 on the Surface of Miranda, each having a different Albedo (---> Reflectivity) and Chemical Composition.
Note: it is possible (but we, as IPF, have no way to be one-hundred-percent sure of such a circumstance), that the actual luminosity of Miranda - as it is in this frame - would appear, to an average human eye, a little bit lower than it has been shown (or, better yet: interpreted) here.MareKromium
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![Nome del file=Oberon-PIA01352-PCF-LXTT-IPF.jpg
Dimensione del file=69KiB
Dimensioni=1500x1620
Aggiunta il=Set 08, 2013 Oberon-PIA01352-PCF-LXTT-IPF.jpg](albums/userpics/10060/small_Oberon-PIA01352-PCF-LXTT-IPF.jpg)
Oberon-PIA01352-PCF-LXTT-IPF.jpgIcy Oberon (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia/Italian Planetary Foundation)58 visiteUranus' outermost and largest moon, Oberon, can be very well seen in this NASA - Voyager 2 frame which was obtained January, 22, 1986, from a distance of approx. 2,77 Million KiloMeters (such as a little more than 1,72 Million Miles). The Clear-Filter Image, shuttered by the Voyager's Narrow-Angle Camera, shows us that Oberon displays several distinct Highly Reflective (---> High-Albedo) "Patches" of its Surface which also show - and this circumstance still sounds kind of strange/unusual - very Low-Albedo Centers. Some of the bright Patches are suggestive of Radial Patterns that could represent the visible consequence of powerful Impact Events which occurred on a basically Ice-rich Surface (in other words, we may be looking at Rayed Impact Craters that formed - were excavated - on an extremely hard and frozen Surface) .
On average, Oberon reflects (in all directions) only about 20% (twenty-percent) of the Incident Sunlight and that fact makes it Celestial Body with a (relatively) Low Albedo. The moon is about 1600 Km (such as approx. 993,6 miles) in diameter; the resolution of this image is roughly 51 Km (such as about 31,67 miles) per pixel. This frame was taken 2 (two) days before Voyager's 2 Closest Approach to Oberon (at which point the Spacecraft flew-by Oberon at a distance of approx. 471.000 Km - such as about 292.491 miles - from its frozen Surface).
This frame (which is an Original NASA - Voyager 2 Spacecraft Natural Color image published on the NASA - Planetary Photojournal with the ID n. PIA 01352) has been additionally processed, contrast enhanced, magnified to aid visibility of the Surface details and then re-colorized, according to an educated guess carried out by Dr Paolo C. Fienga/LXTT/IPF, in what they should be its Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Voyager 2 Spacecraft and then looked outside, towards the Uranian moon Oberon), 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 on the Surface of Oberon, each having a different Albedo (---> Reflectivity) and Chemical Composition.
Note 1: it is possible (but we, as IPF, have no way to be one-hundred-percent sure of such a circumstance), that the actual luminosity of Oberon - as it is in this frame - would appear, to an average human eye, a little bit lower than it has been shown (or, better yet: interpreted) here.
Note 2: the "squared" feature visible at about 4 o'clock of Oberon's disk (almost on the Limb of the moon and right on the Terminator Line), is just an original image defect.MareKromium
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![Nome del file=UMBRIEL-PIA00040-PCF-LXTT-IPF.jpg
Dimensione del file=237KiB
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Aggiunta il=Feb 24, 2013 UMBRIEL-PIA00040-PCF-LXTT-IPF.jpg](albums/userpics/10060/small_UMBRIEL-PIA00040-PCF-LXTT-IPF.jpg)
UMBRIEL-PIA00040-PCF-LXTT-IPF.jpgUmbriel (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)68 visiteThe Southern Hemisphere of the Uranian moon Umbriel displays heavy Cratering in this NASA - Voyager 2 image, taken on January 24, 1986, at a distance of approx. 557.000 Km (such as a little less than 346.000 miles) from the Surface of the moon. This frame, taken through the Clear-Filter of Voyager's Narrow-Angle Camera, is the most detailed image of Umbriel that we have, with a resolution of about 10 Km (such as 6,21 miles) per picture element.
Umbriel is the darkest of Uranus' larger moons and the one that appears to have experienced the lowest level of Geological Activity. It has a diameter of about 1200 Km (a little more than 745 miles) and its Surface reflects only 16% of the light that receives; in the latter respect, Umbriel is similar to the Lunar Highland Areas of our own Moon. Umbriel, as we wrote herebefore, is heavily cratered, but it lacks the numerous Bright-Ray Craters that are commonly seen on the other large Uranian Natural Satellites; this fact, among other things, results in a relatively uniform Surface Albedo (---> Reflectivity).
The prominent Impact Crater visible on the Terminator (at about 11 o'clock of Umbriel's disk) is approx. 110 Km (such as 68,3 miles) across and it shows a really bright Central Peak. On the other hand, the strangest Surface Feature visible in this image (on the Limb of Umbriel, right at 12 o'clock of the disk) is a curious-looking Bright Ring which represents the most reflective area seen on Umbriel itself. The Bright Ring is about 140 Km (approx. 87 miles) in diameter and it lies near the moon's Equator. The nature of the Bright Ring is unknown, although it might be a very large Frost Deposit, perhaps associated with (located on top and near) the Rim of a huge Impact Cater. The few white spots that can be barely seen against the black background are not stars, but just just image artifacts, due to 'noise' in the data received on Earth.
This frame (which is the Original NASA - Voyager 2 b/w image published on the NASA - Planetary Photojournal with the ID n. PIA 00040) has been additionally processed and then colorized, according to an educated guess carried out by Dr Paolo C. Fienga (LXTT-IPF), in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Voyager 2 Spacecraft and then looked outside, towards the Neptunian moon Triton), 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 on the Surface of Triton, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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![Nome del file=Titania-PIA01979-PCF-LXTT-IPF.jpg
Dimensione del file=184KiB
Dimensioni=3000x2143
Aggiunta il=Set 04, 2012 Titania-PIA01979-PCF-LXTT-IPF.jpg](albums/userpics/10060/small_Titania-PIA01979-PCF-LXTT-IPF.jpg)
Titania-PIA01979-PCF-LXTT-IPF.jpgTitania (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)98 visiteCaption NASA:"Voyager 2 obtained this full-disk view of Uranus' moon Titania in the early morning hours of Jan. 24, 1986, from a distance of about 500.000 Km (approx. 300.000 miles). Many circular depressions -- probably impact craters -- are visible in this clear-filter image returned by the Voyager narrow-angle camera.
Other bright spots are distinguished by radiating rays and are probably halo craters that mark relatively more recent impacts. Even more interesting are Linear Troughs (right) that are probably Fault Canyons (Tectonic Fractures). The Troughs break the crust in two directions, an indication of some tectonic extension of Titania's crust. These features indicate that this icy satellite has a dynamic, active interior. Titania is about 1600 Km (approx. 1000 mi) in diameter; the resolution of this image is about 9 Km (approx. 6 mi) per pixel". MareKromium
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![Nome del file=Miranda-PIA00042-PCF-LXTT.jpg
Dimensione del file=18KiB
Dimensioni=459x600
Aggiunta il=Feb 25, 2011 Miranda-PIA00042-PCF-LXTT.jpg](albums/userpics/10060/small_Miranda-PIA00042-PCF-LXTT.jpg)
Miranda-PIA00042-PCF-LXTT.jpgMiranda (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)202 visitenessun commentoMareKromium
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![Nome del file=Miranda-PIA01354-PCF-LXTT.jpg
Dimensione del file=52KiB
Dimensioni=800x470
Aggiunta il=Feb 25, 2011 Miranda-PIA01354-PCF-LXTT.jpg](albums/userpics/10060/small_Miranda-PIA01354-PCF-LXTT.jpg)
Miranda-PIA01354-PCF-LXTT.jpgVerona Rupes (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)216 visitenessun commentoMareKromium
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![Nome del file=Miranda-PIA00044-Verona_Rupes-PCF-LXTT.jpg
Dimensione del file=196KiB
Dimensioni=1521x1500
Aggiunta il=Feb 25, 2011 Miranda-PIA00044-Verona_Rupes-PCF-LXTT.jpg](albums/userpics/10060/small_Miranda-PIA00044-Verona_Rupes-PCF-LXTT.jpg)
Miranda-PIA00044-Verona_Rupes-PCF-LXTT.jpgVerona Rupes (Super Close-Up - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)201 visitenessun commentoMareKromium
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![Nome del file=VI-Puck-HR-V2.JPG
Dimensione del file=16KiB
Dimensioni=512x512
Aggiunta il=Mar 18, 2009 VI-Puck-HR-V2.JPG](albums/userpics/10060/small_VI-Puck-HR-V2.JPG)
VI-Puck-HR-V2.JPGPuck (possible Natural Colors; credits: Lunar Explorer Italia)73 visitenessun commentoMareKromium
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![Nome del file=Titania-PIA01979.jpg
Dimensione del file=23KiB
Dimensioni=784x560
Aggiunta il=Mar 16, 2009 Titania-PIA01979.jpg](albums/userpics/10060/small_Titania-PIA01979.jpg)
Titania-PIA01979.jpgTitania (possible Natural Colors; credits: Lunar Explorer Italia)53 visiteCaption NASA:"Voyager 2 obtained this full-disk view of Uranus' moon Titania in the early morning hours of Jan. 24, 1986, from a distance of about 500.000 Km (approx. 300.000 miles). Many circular depressions -- probably impact craters -- are visible in this clear-filter image returned by the Voyager narrow-angle camera.
Other bright spots are distinguished by radiating rays and are probably halo craters that mark relatively more recent impacts. Even more interesting are Linear Troughs (right) that are probably Fault Canyons (Tectonic Fractures). The Troughs break the crust in two directions, an indication of some tectonic extension of Titania's crust.
These features indicate that this icy satellite has a dynamic, active interior. Titania is about 1600 Km (approx. 1000 mi) in diameter; the resolution of this image is about 9 Km (approx. 6 mi) per pixel". MareKromium
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