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OPP-SOL1329-1N246174167EFF8788P0175L0M1.jpgPaving and Razorblades inside Victoria (2 - possible natural colors; light-blue color filter on; elab. Lunexit)56 visitenessun commentoMareKromium
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PSP_005680_1525_RED_abrowse-00.jpgPossible ancient Salt Deposits in Terra Cimmeria (Extremely Saturated and ENhanced Natural Colors - credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)56 visiteThe ancient cratered highlands of the Southern Hemisphere of Mars has an intriguing and complex history as it has been riddled with impact craters and modified by volcanic processes and by the wind.
Additionally, it is one of the most heavily dissected terrains on Mars exhibiting the densest population of Valley Networks: old dried up channels and valleys that may have been formed by surface runoff, the seepage of ground water, or both.
Recently, the Thermal Emission Imaging System (THEMIS) aboard Mars Odyssey, in conjunction with spectral data from the Thermal Emission Spectrometer (TES) aboard the Mars Global Surveyor (MGS) have revealed the presence of a unique surface deposit that may be rich in chloride salts formed from the presence of liquid water. Three separate missions (MGS, MO and MRO) have come to reveal the composition and nature of these unique deposits, which, although they occur as relatively small deposits (less than 25 square Km) are widely distributed in Noachian (most ancient) terrains with fewer occurrences in the Hesperian (middle geologic time) terrains.
The deposit appears to be relatively thin and occurs in low-lying areas. It is also heavily pockmarked and discontinuous, possibly from removal of the material by erosion. Both of these aspects suggest that the deposit is indeed very old.
The presence of such salts is intriguing, and strongly suggests that conditions were favorable for water near or at the surface in the geologic past.
Polygonal cracks can be observed in this image and other images of these deposits elsewhere on Mars (see PSP_003160_1410) and are similar to desiccation cracks (formed from the rapid evaporation and drying of a wet surface) and indicate that these may were more likely deposited at the surface.
However, the volume and duration the water required for these deposits is still being investigated. MareKromium
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Comets-Comet_Holmes.jpgComet 17-P-Holmes56 visiteCaption NASA, da "NASA - Picture of the Day" del 26 Ottobre 2007:"Comet 17 P-Holmes stunned comet watchers across planet Earth earlier this week.
On October 24th, 2007, it increased in brightness over half a million times in a matter of hours. The outburst transformed it from an obscure and faint comet quietly orbiting the Sun with a period of about 7 years to a naked-eye comet rivaling the brighter stars in the constellation of Perseus. Recorded on that date, this view from Teheran, Iran, highlights the comet's (enhanced and circled) dramatic new visibility in urban skies.
The inset (left) is a telescopic image from a backyard in Buffalo, New York showing the comet's greatly expanded coma, but apparent lack of a tail. Holmes' outburst could be due to a sudden exposure of fresh cometary ice or even the breakup of the comet nucleus. The comet may well remain bright in the coming days".MareKromium
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LLN-Itokawa-ST_2506464135_v.pngApproaching Itokawa (1 - natural colors; elab. Lunexit)56 visitenessun commentoMareKromium
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LLO-Itokawa-ST_25590030-68_v.jpgThe unbelievable surface of 25143-Itokawa (HR2 - possible natural colors; elab. Lunexit)56 visitenessun commentoMareKromium
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LLO-Itokawa-ST_25326292LL77_v.jpgThe unbelievable surface of 25143-Itokawa (HR1 - possible natural colors; elab. Lunexit)56 visitenessun commentoMareKromium
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LLP-Itokawa-ST_2539496392_v.pngFarewell to Itokawa! (3 - additional processing and coloring by Lunexit)56 visitenessun commentoMareKromium
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LLP-Itokawa-ST_2539489658_v.pngFarewell to Itokawa! (2 - additional processing and coloring by Lunexit)56 visitenessun commentoMareKromium
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Quasar_MC2-1635+119-A.jpgQuasar MC2-1635+11956 visite"...Da operam ne quid umquam invitus facias..."
(Seneca)
"...Fa in modo di non fare mai nulla di mala voglia..."MareKromium
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OPP-SOL1338-1P156772319EDN4000P2279L6M1.jpgCreation and solution of a (pseudo) Mistery - Sol 1338 (possible natural colors - elab. Marco Faccin)56 visiteL'elaborazione in possibili colori naturali di questo frame che ritrae una porzione dei Pannelli Solari del MER Opportunity e qualche dettaglio del terreno circostante è, a nostro parere, una delle più belle e realistiche mai realizzate dall'Amico e Collega, Dr Marco Faccin, che ringraziamo ed al quale facciamo i nostri più vivi complimenti! Ma non è tutto qui... Nell'inset in b/n, infatti, un'immagine ingannevole: una porzione dei MER che si confondeva con il terreno, generando l'illusione dell'esistenza di una struttura rettangolare e regolare sulla superficie. Ebbene, così come era stato creato, così il mistero è stato risolto, sempre dal Dr Faccin: la possibile "mattonella" era solo una componente del Rover che, sia a causa della sua posizione sui Pannelli Solari, sia a causa della particolare posizione del dettaglio nel quadro dell'intero frame, poteva trarre in inganno tanti Osservatori.
La morale, come sempre, è semplice: senza entusiasmo, la Ricerca non va avanti, ma con troppo entusiasmo, si rischia di prendere delle "planetarie cantonate".
Le immagini sono ingannevoli, molto spesso, e l'occhio migliore per esaminarle in maniera accurata e profonda, deve essere, si, attento ed appassionato, ma anche pragmatico e disincantato: la "sorpresa", in effetti - se c'è e quando c'è - si rivela da sola.
Sempre.
Ancora complimenti al Dr Faccin per questo SPLENDIDO Lavoro!
MareKromium
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Enceladus-PIA09761.jpgThe "Fountains" of Enceladus (again)56 visiteCaption NASA:"With Enceladus nearly in front of the Sun from Cassini's viewpoint, its icy jets become clearly visible against the background.
The view here is roughly perpendicular to the direction of the linear "tiger stripe" fractures, or sulci, from which the jets emanate. The jets here provide the extra glow at the bottom of the moon. The general brightness of the sky around the moon is the diffuse glow of Saturn's E-Ring, which is an end product of the jets' material being spread into a "torus", or doughnut shape, around Saturn.
North on Enceladus is up and rotated 20° to the left.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 30, 2007. The view was obtained at a distance of approx. 187.000 Km (such as about 116,000 miles) from Enceladus and at a Sun-Enceladus-spacecraft, or phase, angle of 157°.
Image scale is about 1 Km (apprx. 0,6 mile) per pixel".MareKromium
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OPP-SOL1338-1P246971497EFF8788P2391L2M1.jpgVictoria's Paving (detail mgnf - possible natural colors; elab. Lunexit) - Sol 133856 visitenessun commentoMareKromium
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