After One-Thousand Soles...
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SOL1919-EB-LXTT2.jpgLittle Bright Shining Star... - Sol 1919 (Natural Colors; credits: Elisabetta Bonora - Lunexit Team)88 visitenessun commentoMareKromium
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SOL1919-EB-LXTT3.jpgLittle Bright Shining Star... - Sol 1919 (Absolute Natural Colors; credits: Elisabetta Bonora - Lunexit Team)56 visitenessun commentoMareKromium
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SOL1919-GB-LXT.jpgHorizon with Dust Devils - Sol 1919 (Natural Colors; credits: Dr G. Barca & Lunexit)55 visitenessun commentoMareKromium
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![SOL1919-GB-LXT[1].jpg](albums/userpics/10060/small_SOL1919-GB-LXT%5B1%5D.jpg "Nome del file=SOL1919-GB-LXT[1].jpg
Dimensione del file=355KiB
Dimensioni=1600x1600
Aggiunta il=Ago 31, 2009")
SOL1919-GB-LXT[1].jpgUnusually-looking Surface Features - Sol 1919 (Natural Colors; credits: Dr G. Barca & Lunexit - additional credits: Giorgio Picciau)93 visiteDal nostro Grande Amico e Partner, Giorgio Picciau, tre interessantissime "puntualizzazioni" su un frame Spirit di qualche tempo fa: due Surface Features curiosamente antropomorfiche (di cui la "Rana" è, a nostro avviso, semplicemente eccezionale!) ed un bizzarro, nonchè inesplicabile, effetto "Fireflies", ossìa "lucciole".
Il dettaglio è quello posizionato centralmente e, sulla porzione in ombra della (anonima) roccia individuata da Giorgio, risultano ben visibili tre puntini luminosi semi-allineati.
La spiegazione più plausibile è quella che ci dice che si tratta di image-artifacts (i "puntini luminosi", ora bianchi ed ora neri, sono spesso presenti nei frames Spirit ed Opportunity e, spesso, ci hanno fatto parlare - sbagliando - di possibili anomalìe o di OVNI), ma la nostra sensazione è che si tratti di rilievi reali.
Qualunque sia la risposta e, con essa, la Verità, noi - per ora - possiamo dire solo una cosa: Complimenti a Giorgio Picciau per l'"Occhio" che ha dimostrato di possedere e, ovviamente, per l'Amicizia ed il costante aiuto e supporto dato nel e per il nostro duro - e, ahinoi!, sempre più spesso ingrato, ma pur SEMPRE MERAVIGLIOSO - Lavoro)!MareKromium
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SOL1919-PIA12120.jpgHuge Dust Devil Northwest of Spirit - Sol 191955 visiteCaption NASA:"Researchers used the NavCam on NASA's Mars Exploration Rover Spirit to look for Dust Devils near the Rover during the Mission's 1919th Sol (May 27, 2009). This shot from that day's sequence, presented here with three different levels of processing, caught a large Dust Devil about 1,5 Km (a little less than 1 mile) North-West of Spirit.
The top frame is the original image, the middle frame has been processed enhance the visibility of the Dust Devil, and the bottom frame is a merged version. The image was taken in the early afternoon (note: such as in that period of time comprised between 12:30 and 15:30) from Spirit's position at the "Troy" sand trap beside "Home Plate", looking northwest across the floor of Gusev Crater.
The large Dust Devil shows a typical central core (brightest area) surrounded by a more diffuse sand and dust "skirt" about 415 mt (such as about 1350 feet) across. The Dust Devil is moving toward the North-East (toward the right in this image) at about 0,75 meter-per-second (meaning 1,7 miles-per-hour).
This Dust Devil is some 20 times larger than the average Dust Devil on Earth. A smaller Dust Devil is seen on the right leading the larger DD.
More than 650 DDs have been recorded by Spirit since its operation began in 2004. The Mission is currently in its third "season" for DDs on Mars, which typically begin in Martian Spring".MareKromium
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SOL1919-PIA12121.jpgColorful Effect from sequential shots of moving Dust Devils - Sol 191955 visiteCaption NASA:"While the Panoramic Camera (PanCam) on NASA's Mars Exploration Rover Spirit was taking exposures with different color filters during the 1919th Martian Day of the Rover's Mission (May 27, 2009), several Dust Devils moved across the field of view. Because several seconds intervened between shots with different filters, the location of the Dust Devils changed between the exposures.
The three grayscale images stacked from the bottom of this four-part view are the separate exposures through filters centered on wavelengths of 750 nanometers, 530 nanometers and 430 nanometers. Contrast has been stretched to emphasize the Dust Devils on the horizon.
At the top is a composite image combining those exposures to yield a color scene of the Martian ground. The time intervals between the exposures result in the darker Dust Devil appearing blue at its first location, violet at its second location and yellow at its third location. A second Dust Devil was consolidating during the first two exposures and appears orange at its location when the third exposure was taken. In the foreground is the northern end of a ridge called "Tsiolkovsky", about 25 meters (about 80 feet) from Troy.
Dust Devils occur on both Mars and on Earth when solar energy heats the Surface, resulting in a layer of warm air just above the Surface. Since the warmed air is less dense than the cooler atmosphere above it, it rises, making a swirling thermal plume that picks up the fine dust from the surface and carries it up into the atmosphere. This plume of dust moves with the local wind".MareKromium
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SOL1921-GB-LXT.jpgGray Layers under a gray Sky - Sol 1921 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)54 visitenessun commentoMareKromium
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SOL1922-2P296996697EFFB1DQP2291R2M1.jpgRocky Skyline - Sol 1922 (Natural Colors; credits: Lunar Explorer Italia)54 visitenessun commentoMareKromium
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SOL1922-2P296997007EFFB1DQP2291L2M1.jpgRocky Skyline - Sol 1922 (Natural Colors; credits: Lunar Explorer Italia)54 visitenessun commentoMareKromium
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SOL1922-GB-LXT.jpgRocky Skyline - Sol 1922 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)54 visitenessun commentoMareKromium
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SOL1922-GB-LXT~0.jpgRocky Skyline - Sol 1922 (Natural - but slightly enhanced - Colors; credits: Dr G. Barca & Lunar Explorer Italia)54 visitenessun commentoMareKromium
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SOL1922-Panoramic-GB-LXT.jpgRocky Skyline - Sol 1922 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)54 visitenessun commentoMareKromium
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