| Risultati della ricerca nelle immagini - "Summit" |
15-U-Tobias.jpgTobias Mayer Crater, from Lunar Orbiter 5 (3D)83 visiteOriginal caption:"Stereoscopic view of an area sw of the Crater Tobias Mayer in Oceanus Procellarum. The highland ridge in the middle portion of the anaglyph is about 35 Km long and 2 Km high. A smooth mare dome abuts the western flank of the ridge. The dome is about 20 Km in diameter and exhibits an elongate summit crater, about 5 Km long.
A sinuous rille meanders across the lower part of the photograph, detouring around the base of the dome. Note the presence of several crater chains in the lower half and a large highland mass at upper left".
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APOLLO 15 AS 15-9960.jpgAS 15-9960 - The "D" in "Detail"...52 visiteThe enlarged view provided by this stereogram shows that there are at least 3 different types of material within the floor of the D-shaped depression (see AS 17-1672). A brighter annulus parallels the wall, and darker material fills the inner floor.
Within both areas numerous bulbous and slightly raised comical structures are easily distinguishable.
There are craters on the summits of many of the structures, suggesting that each one is probably an extrusive dome with a summit crater.
Many similar features on Earth are caused by the subterranean drainage of lavas following extrusion and release of pressure following the upward movement of a central plug.
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APOLLO 16 AS 16-120-19268.jpgAS 16-120-19268 - King Crater52 visiteThe similarity in appearance of the Southern part of the central peak and the slump terraces on the Southern wall of the crater is emphasized in this oblique view of the crater King.
The parallelism of the two arms of the central peak and the Southern segment of the peak suggests that the unique shape of the structure is caused by a preexisting tabular body that was excavated during the formation of the crater.
Numerous comical structures with summit pits are present on the crater floor in the lower right part of the photograph.
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Animazione_SOL625-2F181850260EFFAEU0P1201L0M1.gifClimbing "Hillary" (GIF-Movie from frames taken during Sol 625; credits: Dr Gianluigi Barca)52 visiteATTENZIONE: guardate questa "ripida ascesa" del Rover Spirit il quale sta cercando di guadagnare (come dicono alla NASA) un "vantage point" che gli consenta poi di scattare delle fotografie non solo dell'outcrop in questione (chiamato "Hillary"), ma anche del paesaggio sottostante ed ulteriore (non dimenticate che siamo sul Summit della Collina Husband).
Siamo nel Sol 625. Ora andiamo a vedere che succede durante il Sol 626...MareKromium
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ESP_012692_1810_RED_abrowse.jpgThe "Dusty" Summit of Pavonis Mons (Natural Colors; credits: Lunar Explorer Italia)52 visitePavonis Mons is one of the 3 giant Tharsis Montes Shield Volcanoes. Its Summit rises so far above the Surface that the Atmosphere is extremely thin, even for Mars.
Dust that reaches these heights (for example, during major Dust Storms) is hard to remove, so the upper parts of these Volcanoes are covered by vast deposits of dust. The dust is moved a little by the thin winds, producing ripples and other textures near the limit of HiRISEs resolution. The fluffy, ripply surface looks smudged or out of focus, but by looking at some of the small impact craters you can see that the HiRISE camera is, indeed, properly focused. Its the surface of Mars that is blurry!
Nota Lunexit: NO. A nostro parere NON la Superficie di Marte che "sfuocata" (blurry) e non neppure la fotocamera dell'Orbiter che "out of focus". Si tratta, come abbiamo gi visto in passato (nelle immagini dei fly-by ravvicinati di alcune Lune Saturniane - Encelado su tutte) di un caso classico di "Sfuocatura da Movimento" (in altre parole: un mero problema di lunghezza dell'esposizione - ivi: eccessiva -, data la vicinanza del target ripreso in rapporto alla velocit dell'Orbiter rispetto al medesimo). Curioso che i Ragazzi di Pasadena non ci abbiano pensato...
The impact craters also show that the dust is not a thin veneer. Instead, it is a thick coat, at least several meters deep. This mantling of dust hides the details of the Lava Flows and Vents, frustrating volcanologists but delighting those who study dust.
Mars Local Time: 15:23 (early afternoon)
Coord. (centered): 0,9 North Lat. and 246,8 East Long.
Spacecraft altitude: 254,1 Km (such as about 158,8 miles)
Original image scale range: 50,8 cm/pixel (with 1 x 1 binning) so objects ~1,53 mt across are resolved
Map projected scale: 50 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 2,5
Phase Angle: 52,4
Solar Incidence Angle: 55 (meaning that the Sun is about 35 above the Local Horizon)
Solar Longitude: 244,7 (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_016173_2005_RED_abrowse-1.jpgSmall Shield Volcano with "Summit Caldera" (CTX Frame - Saturated and Enhanced Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team) 52 visitenessun commentoMareKromium
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ESP_016173_2005_RED_abrowse-3.jpgSmall Shield Volcano with "Summit Caldera" (Saturated and Enhanced Natural Colors; credits: Dr M. Faccin - Lunexit Team)52 visiteAlthough there are a few truly giant Shield Volcanoes on Mars, there are also many smaller ones.
There's a strong interest in imaging the Volcanic Vent Regions of Mars, in order to understand not only the Volcanic Processes themselves, but also to search for any signs of recent activity.
In fact, it has been suggested that active volcanism is one possible explanation for the Methane gas that has been detected in the Atmosphere of Mars.
This HiRISE image shows that the Summit Caldera of a small Shield Volcano is mantled by Dust and covered by tiny Impact Craters. And it is just this last element (such as the existence of Impact Craters all over the Caldera) the one that allows us to believe that there are basically no chances that the imaged Volcano was active recently enough to affect the Atmosphere of Mars through the release of any gas whatsoever.MareKromium
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ESP_024044_1555-PCF-LXTT.jpgSmall Knob with "Summit Pit" (Absolute Natural Colors; credits for the additioonal process. and color.: Dr Paolo C. Fienga - Lunexit Team)246 visiteMars Local Time: 14:19 (Early Afternoon)
Coord. (centered): 24,0 South Lat. and 285,6 East Long.
Spacecraft altitude: 253,4 Km (such as about 158,4 miles)
Original image scale range: 25,4 cm/pixel (with 1 x 1 binning) so objects ~ 76,0 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 5,5
Sun-Mars-Spacecraft (or "Phase") Angle: 46,0
Solar Incidence Angle: 41 (meaning that the Sun is about 49 above the Local Horizon)
Solar Longitude: 359,7 (Northern Winter)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Dr Paolo C. Fienga - Lunar Explorer ItaliaMareKromium
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LRO-Craters-Tycho-Central_Peak-PCF-LXTT-0.jpgTycho's Peak (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)226 visiteCaption NASA:"Tycho Crater's Central Peak Complex casts a long, dark shadow near Local Sunrise in this spectacular Lunarscape. The dramatic oblique view was recorded on June 10, 2011, by the Lunar Reconnaissance Orbiter. Shown in amazing detail, boulder strewn slopes and jagged shadows appear in the highest resolution version at 1,5 meters per pixel. The rugged Complex is about 15 Km wide, formed in uplift by the giant impact that created the well-known crater about 100 MYs ago. The Summit of its Central Peak reaches approx. 2 Km above the Floor".MareKromium
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Moon and Companions~2.jpgHappy New Year from the Moon and Venus68 visiteDa "NASA - Picture of the Day" del 4 Gennaio 2006:"Fading sunlight, a young crescent Moon, and brilliant Venus shared the Western Sky in this view of 2005's final sunset from the top of Mount Haleakala, on Maui, Hawaii. Also known as the Sacred House of the Sun, Haleakala, is Maui's dormant volcano.
At 10.000 feet, the Summit is an ideal site for astronomical observatories, and this scene also features the silhouette of the Northern Hemisphere Faulkes Telescope. It can be of particular interest to students the fact that the Faulkes Telescope (a 2-meter diameter instrument, dedicated to astronomy education), can be remotely operated over the internet.
The Project is a joint effort between the Dill Faulkes Educational Trust and the University of Hawaii - Institute for Astronomy (...)".
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ORIGINAL NASA APOLLO 15 - AS15-85-11377.jpgAPOLLO 15 AS 15-85-11377 - There's something behind the hill...4332 visiteUn altro frame assolutamente sbalorditivo per quello che ci fa vedere: da dietro la collina che viene qui fotografata, ben definita contro il nero del cielo e leggermente spostata sulla Vostra Dx (appena a Sn del summit della collina stessa, in un'area fortemente accidentata e parzialmente in ombra), si vede spiccare un'"asta" - o, se preferite, una sorta di "antenna" - color bianco/argento e perfettamente eretta, di dimensioni indefinibili (ma certo piuttosto consistenti). Anche in questo caso siamo al di fuori della casistica propria dei photographic artifacts ed entriamo nel campo dell'Anomalia (di superficie) vera e propria. L'oggetto in questione - che "emerge", letteralmente, da dietro la collina - non n pu essere un oggetto di origine naturale (per ovvi motivi). Pu darsi che si tratti di un qualcosa fatto dagli Astronauti stessi, ma se cos fosse, allora "top secret", poich la NASA, da noi interpellata al riguardo, si chiusa in un (ahim consueto...) totale silenzio...
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P-Mariner9-71-2-PIA02983.jpgMars from Mariner 9: a "Shield Volcano"195 visite(...o appena superiori) a quelli conseguiti dal Mariner 9. Tre decenni e mezzo - a nostro parere - del tutto sprecati. E non dimentichiamo i "colori": le Sonde Mariner e Viking ci hanno mandato svariate immagini in colori "veri" (cio "cos come li vedrebbero i nostri occhi se fossimo l"); oggi, grazie allo "sviluppo tecnologico", non c' una foto di Marte che sia in "colori veri". Sono tutte quante in colori "approssimativamente" veri, e nessuno - NESSUNO! - ha ancora ben capito non solo che cosa significhi esattamente questa approssimazione, ma neppure quanto essa sia attendibile e verosimile...
Caption NASA originale:"A Martian "Shield Volcano" - approx.ly 25 miles across at the crater - photographed consecutively by Mariner 9 with the wide-angle and telephoto lenses. The summit crater and groves down the flank probably were produced by subsidence flowing subsurface movement of magma".
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