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Channels-Drainage_Channel-MO.jpgDrainage Channel System (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)53 visiteCaption NASA:"This small Channel System is located on the Outer Rim of Sytinskaya Crater".
Coord.: 43,1° North Lat. and 306,4° East Long.MareKromium
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Comets-Garrad-PIA12985.jpgComet Garradd54 visiteThis image from the WISE mission was taken on January 2nd, 2010, during the check-out phase, before the start of the WISE survey. It is a mosaic of 3 individual WISE frames spanning an area on the sky about 7 times the size of the full Moon in portions of the constellations Bootes and Canes Venatici.
In the lower right portion of the image there is a streak of orange light. This is most likely a human-made satellite, orbiting Earth at a higher altitude than the WISE telescope, which is at 523 km above the surface. WISE sees many of these as it scans the sky.
Just above the satellite in the image is Comet C/2008 Q3 (Garradd). Comets are balls of dust and ice left over from the formation of the Solar System. As a comet approaches the Sun it is heated and releases gas and dust from its surface that is blown back by the solar wind into a long, spectacular tail. This comet was discovered in August 2008 by Gordon Garradd of the Siding Spring Observatory in Australia. This comet probably comes from the Oort Cloud, a vast collection of remnants from the formation of the Solar System thought to surround it. At the time the comet was observed by WISE, in the constellation Bootes, it was a distance of 419 million kilometers (2.789 Astronomical Units, AU) from Earth. But we are just catching it while it is near the Sun. The orbit calculated for Comet C/2008 Q3 (Garradd) is inclined to the plane of the Solar System by nearly 140 degrees and takes it very far from the Sun (trillions of kilometers). It made its closest approach to the Sun in June of 2009 at a distance of 1.8 AU (270 million km), just outside the orbit of Mars. If it comes back near the Sun at all, it won't be for hundreds of thousands of years.
In the upper left of the image is the impressive globular cluster Messier 3 (M3). M3 was discovered in the constellation Canes Venatici by famous French Astronomer, Charles Messier in 1764, and first seen to be made of stars around 1784 by the British astronomer who discovered infrared light, William Herschel. Globular clusters are huge globs of stars (hence the name) that are found orbiting in the outer reaches of most galaxies. They are thought to form around the same time that a galaxy forms. The Milky Way has over 200 known globular clusters. M3 is one of the largest and brightest globular clusters around the Milky Way. It is just barely visible to the naked eye from a dark location. M3 is made of about half a million stars, thought to be about 8 billion years old. It is about 150 light-years across (1 light-year is equal to 9.46 trillion km) and located some 34,000 light-years from Earth.
WISE sees invisible infrared light, and the colors here are mapped to 3 of the 4 wavelength bands observed by WISE. Blue represents light with a wavelength of 3.4 microns, cyan maps to 4.6 microns and red is lightat 12 microns (a micron is 1 millionth of a meter, and visible light runs from 0.4-0.7 microns). The light from relatively hot objects, like stars in M3, is seen in blue and cyan. Red color represents cooler things, like dust from the comet and its tail. When this image was taken the WISE team was still calibrating the rate of the scan mirror with the motion of the WISE telescope. The rate was not yet perfected and careful examination of this image reveals some stars that are a little smeared and not exactly aligned in the blue/cyan with the red.
MareKromium
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OPP-SOL1167-N1_Gradino.jpgThe "Step" - Sol 1167 (credits: Ivana Tognoloni)84 visite...Una delle più bizzarre e (onestamente) difficili da spiegare Martian Oddities rinvenute dalla nostra bravissima Amica e Partner, Ivana Tognoloni, nell'Inner Rim del Cratere Victoria.
Cratere...
Provocazione: chissà se il Bacino di "Victoria" è davvero un (meraviglioso, ed anche - ormai - un pò banale) "Cratere da Impatto"...MareKromium
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OPP-SOL1402-1N252648246EFF8826P0655L0M1-2.jpgVictoria, under clouds of Dust and Fogs... - Sol 1402 (MULTISPECTRUM; credits: Lunexit)54 visitenessun commentoMareKromium
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OPP-SOL1419-1P254154396EFF8884P2418R2M1.jpgRazorblades, on the edge of Victoria - Sol 1419 (MULTISPECTRUM; credits: Lunexit)58 visiteLa roccia che vedete alla Dx del frame presenta, sul suo lato lungo, una lunga serie di quelle curiose escrescenze lamellari che gli Scienziati di Pasadena hanno battezzato, sin dai tempi dell'esplorazione del Cratere Endurance, come "Razorblades" (ossìa: "lamette da/per rasoio").
La motivazione scientifica di supporto alla spiegazione relativa alla formazione delle "Razorblades" di Endurance fu in individuata nell'esistenza e nel transito di acque correnti, in epoche remote, lungo le pareti ed i Pavimenti del Cratere stesso (nota: le Razorblades, secondo a questa teoria, sarebbero la rimanenza visibile di un accumulo di sali e detriti vari i quali, trasportati da correnti "vive" (ma meglio sarebbe dire "modestissimi rivoli d'acqua"), si sono - nel tempo - ammassati e compattati sui lati dei pavimenti (i quali, di fatto, fungevano da "miniargini" per questi rivoletti di acqua sporca) sino a formare, sui loro bordi, queste "escrescenze".
La costruzione NASA a noi è sempre sembrata ragionevole (soprattutto avendo ben presente la morfologia delle Razorblades di Endurance e la loro collocazione sul suo Paving); tuttavia, se osservate le Razorblades di questo frame - e di altri relativi al Cratere Victoria - non dovrebbe risultarVi difficile notare come l'ipotesi degli Amici di Pasadena, vista la configurazione dei Pavimenti di Victoria, improvvisamente viene a perdere credibilità ed "appeal".
E si: perchè se le Razorblades si fossero formate davvero a seguito di depositi di sali e detriti trasportati da rivoli (anche deboli, ma certo duraturi) d'acqua corrente, allora dovrebbe essere anche possibile individuare, tramite le immagini, il "letto" - piccolo sinchè si vuole, ma certo esistente - del rivolo d'acqua che concorse alla loro formazione.
Minuscoli "letti" che, per Endurance, erano - in parte - visibili, ma che qui, su Victoria, non si vedono proprio.
Certo, l'ipotesi NASA resta - lo riconosciamo tranquillamente - resta la più logica e la più sensata; però un'ipotesi che sia foriera di Verità Scientifiche dovrebbe resistere e confermarsi al sussistere di condizioni di riferimento analoghe od affini.
Il che, purtroppo, in questo caso di specie sembra proprio che non avvenga.MareKromium
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OPP-SOL1419-1P254154623EFF8884P2418R2M1.jpgVictoria's "Lake" (1 - MULTISPECTRUM; credits: Lunexit)65 visitenessun commentoMareKromium
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OPP-SOL1419-1P254154733EFF8884P2418R2M1.jpgVictoria's "Lake" (2 - MULTISPECTRUM; credits: Lunexit)71 visitenessun commentoMareKromium
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Panoramic-AS12-46-6845-6851.jpgFrom AS 12-46-6845 until 6851 (EVA-1; Middle Crescent Crater)67 visite118:18:41 MT - Pete Conrad has moved to his left several feet and starts a clockwise, left-to-right partial pan back around to the Northeastern Rim to give a stereo view of Middle Crescent Crater. The discoloration at the center of the image is due to a dust smudge on the lens that showed up first on AS 6813.
MareKromium
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SOL0120-PIA16707-PCF-LXTT-IPF.jpg"Shaler Unit" - Sol 120 (Slightly Darkened Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)59 visiteCaption NASA:"This image from the Mast Camera (MastCam) onboard NASA's MER Curiosity shows a bizarre-looking Stratigraphic Unit (known as "Cross-Bedding") located in an Outcrop called "Shaler". This Stratigraphic Unit has been informally dubbed "Shaler Unit". This kind of "Cross-Bedding" in the Shaler Unit is indicative of Sediment transport in Stream Flows. Currents mold the Sediments into Small Underwater Dunes that migrated downstream. When exposed in cross-section, evidence of this Migration is preserved in the form of Strata that are steeply inclined as to the Bed (---> River or Lake's Floor) they lay on (thus the term "Cross-Bedding." The grain sizes here are coarse enough to exclude an Aeolian transport.
This Cross-Bedding occurs stratigraphically above the Gillespie Unit located in the "Yellowknife Bay" area of Gale Crater, and is therefore geologically younger. The MastCam obtained the image on the 120th Martian day, or sol, of Curiosity's Operations (such as December, 7th, 2012).MareKromium
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SOL1197-2P232626009EFFATB4P2629L4M1.jpgAfternoon on Mars... - Sol 119753 visitenessun commentoMareKromium
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ZZ-Mercury-Craters-Geddes_Crater-PIA16302-PCF-LXTT-IPF-2.jpgCollapse Pit inside Geddes Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)80 visiteGeddes Crater (so named, in March 2010, in honor of Wilhelmina Geddes (1887 - 1955), an Irish stained glass and graphic artist) is well known to be a Mercurian extremely geologically interesting Impact Feature. As you know, the Ridge of Antoniadi Dorsum bisects the Crater, and in the center of the Crater's Floor there is a large Depression with a distinctive orangish hue: a color similar to the one seen in other areas (still on Mercury and elsewhere in the Solar System, such as, for instance, on our Moon) which are (better yet: were) associated with Explosive Volcanism or other phenomena of (perhaps Sulphurous-rich) Outgassing. This recently acquired image reveals new, High-Resolution detail of such a potentially Volcanic Depression (---> a Volcanic - in origin - Collapse Pit, to be more specific, which might have formed as a consequenc of the progressive withdrawal of Subsurface Magma), including the presence of many Hollows (a Surface Feature that, as we know now, is extremely common and that can be found all over the Surface of Mercury and which do not seem to be only related, in our opinion, as IPF, to the verification of Impact Events).
Date acquired: October, 11th, 2012
Image Mission Elapsed Time (MET): 258458455
Image ID: 2745982
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 27,15° North
Center Longitude: 330,4° East
Resolution: 28 meters/pixel
Solar Incidence Angle: 74,1° (meaning that the Sun, at the time that the picture was taken, was about 15,9° above the imaged Local Mercurian Horizon)
Emission Angle: 33,2°
Sun-Mercury-Messenger (or "Phase") Angle: 107,3°
This picture (which is an Original NASA - MESSENGER Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 16302) 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 - MESSENGER Spacecraft and then looked down, towards the Surface of Mercury), 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 other things, the existence of different Elements (Minerals) present on the Surface of Mercury, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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