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OPP-SOL758-1P195468289EFF65C3P2365L7M1.jpgNatural or artificial? (1) - Sol 75858 visiteCaption Originale:"Left PanCam Non-linearized Full frame EDR acquired on Sol 758 of Opportunity's mission to Meridiani Planum at approximately 10:02:59 MLT.
Camera commanded to use Filter 7 (432 nm)".
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Craters-Buried_Crater-00.JPGUnder the Sand (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows a partially-buried crater in the North Polar Region of Mars.
The circular feature is surrounded and partly overlain by some of the many, many sand dunes in the area. The steepest slopes on each dune — their "slip faces" — face toward the SouthEast, indicating that the dominant winds responsible for sand transport in this Region come from the NorthWest".
Location near: 76,0° North; 82,2° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
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Titan-N00055570.jpgWhat's happening on Titan? (7)58 visiteE come l'Anomalìa era apparsa (improvvisamente), così essa scompare, dopo essere stata ripresa per svariati frames.
La "sparizione" sarà dipesa dal cambio di filtro o da altre motivazioni che, al momento, ci sfuggono? Voi che ne dite? Che cosa abbiamo realmente guardato?...
Caption NASA:"N00055570.jpg was taken on March 20, 2006 and received on Earth March 20, 2006. The camera was pointing toward Titan that, at the time, was approximately 974.967 Km away.
The image was taken using the P120 and GRN filters".
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Rhea-N00055690.jpgRhea and a "streak of light"58 visiteCerchiatura Bianca: un (nuovo) "streak" di luce bianca e molto intensa il quale, laddove non fosse il solito photoartifact, potrebbe concretare una interessante Anomalìa.
In realtà, la "striscia" in questione non ci pare proprio un photoartifact ed inoltre essa non dovrebbe neppure essere la semplice evidenza di un corpo celeste (un'altra luna di Saturno, ad esempio) il quale è rimasto non solo sovraesposto, ma anche strisciato (o "mosso") a causa della (eccessiva) durata della ripresa fotografica in rapporto alla velocità della Sonda . Per altro, anche osservando altri frames della Serie "N" - ad esempio N00055772 - la nostra sensazione è che il moto di Cassini, dal punto di vista dell'Osservatore e rispetto a Rhea, è ORIZZONTALE (da Sx a Dx) mentre lo streak è invece VERTICALE!
Deduzione logica: lo streak rappresenta un oggetto reale, situato ad una distanza indefinita da Cassini, il quale si sta muovendo rapidamente mentre asseconda una traiettoria incongrua rispetto a quella di Cassini.
Un "UFO", insomma...
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Saturn-PIA08140.jpgRestless Atmosphere (1)58 visiteThis atmosphere close-up shows bright clouds in Saturn's Northern Hemisphere being sheared apart. The clouds at the bottom of the image are tilted and stretched because the wind at those lower latitudes is moving much faster to the East than the wind at the higher latitudes near the top of the image, hence the shear.
This appearance suggests that these bright eddies are passive tracers of the atmosphere's motion - they appear, probably as a result of upwelling due to convection from below, and then they are sheared apart.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 16, 2006, at a distance of approximately 3,3 MKM (about 2 MMs) from Saturn. The image scale is roughly 19 Km (about 12 miles) per pixel.
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The Sun-P-021-01450.jpgJapanese Sun58 visitenessun commento
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Rhea-N00055743.jpgMoments of Rhea (5)58 visitenessun commento
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Rhea-N00056068.jpgDark Rhea and the Rings58 visitenessun commento
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Jupiter_s SouthPole-PIA07784.jpgThe South Pole of Jupiter58 visiteThe South Polar Regions shown here are less clearly visible because Cassini viewed them at an angle and through thicker atmospheric haze.
The round maps are polar stereographic projections that show the North or South Pole in the center of the map and the Equator at the edge.
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SOL792-2N196680545EFFAQCYP1911R0M1.jpgTracks, salts and sulphates (4) - Sol 79258 visitenessun commento
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Solar Eclypse 2006-tse2006_ayiomamitis_f.jpgThe "Diamond Ring"58 visiteDa "NASA - Picture of the Day" del 30 Marzo 2006:"The track of totality for the first solar eclipse of 2006 began early yesterday on the East coast of Brazil and ended half a world away at sunset in Western Mongolia. In between, the shadow of the Moon crossed the Atlantic Ocean, Northern Africa, central Asia and so came for a moment to the small Greek island of Kastelorizo in the Eastern Aegean.
Astronomer Anthony Ayiomamitis reports that the islanders and many eclipse-watching visitors were indeed treated to an inspiring display of the beautiful Solar Corona as totality lasted about 3 minutes.
As the total phase of the eclipse ended, he was able to capture this striking "Diamond Ring" image. In it, the first rays of sunlight shining through edge-on lunar valleys create the fleeting appearance of glistening diamonds set in a bright ring around the Moon's silhouette".
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Craters-Unnamed_Crater_with_Pedestal-PIA08029.jpgUnnamed Pedestal Crater in Promethei Terra (Original NASA/MGS/MSSS b/w Frame)58 visiteCaption NASA originale:"This MGS-MOC image shows a Pedestal Crater in the Promethei Terra Region. The Ejecta from an impact crater is usually rocky. The rocks in the Ejecta help shield the Terrain beneath the Ejecta from being eroded away by Wind. Thus, over time, some Craters appear to be raised on Pedestals defined by their Ejecta Blankets, because Wind has stripped away tons and tons of surrounding material".
Location near: 65,4° South Lat. and 264,7° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
Nota: un altro (relativamente) famoso cratere con (o su) piedistallo si trova su Venere ed è conosciuto con il nome di Cratere Adivar.
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