| Piú votate - A Tribute To Mars Global Surveyor |
Controversial_Features-The_D_M_Pyramid-01.gifThe D&M Pyramid (High-Def-3D)126 visiteSe i 3D relativi alla "Faccia di Marte" hanno demolito - a nostro parere - le speculazioni relative ad una possibile artificialità del rilievo, altrettanto non si può dire per la "Piramide D&M". Anche in questo caso la tecnica del 3D ci dà un aiuto per muoverci verso la comprensione, ma si tratta di un aiuto davvero modesto.
La Piramide D&M "sembra" - ripetiamo "sembra" - se si guarda alla sua base (versante Nord-Ovest) avere una qualche sorta di squadratura, ma questo indizio è davvero troppo precario ed inconcludente per spingerci verso una congettura di artificialità. Precarietà ed inconcludenza che si palesano molto chiaramente quando andiamo a verificare i lati Nord-Est epoi l'intero versante Sud, laddove la presunta "squadratura" cede il posto ad un diegno del tutto irregolare ed indefinibile.
Comunque, proprio in virtù di quanto appare nella porzione Nord-Ovest della pseudo-collina, lasciamo la porta aperta a qualche ulteriore analisi speculativa e, nel frattempo, aspettiamo nuove immagini...
(5 voti)
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Craters-Terby_Crater-01.jpgThe Sedimentary Layers of Terby Crater (1 - Original NASA/MGS/MSSS b/w Frame)54 visiteOriginal caption:"This MGS-MOC image shows some of the light-toned, layered, Sedimentary Rock Outcrops in Northern Terby Crater. Terby is located along the North edge of Hellas Planitia. The Sedimentary Rocks might have been deposited in a greater, Hellas-filling sea — or not. Today, the rocks are partly covered by dark-toned Sediment and Debris".
Location near: 27,2° South Lat. and 285,3° West Long.
Image width: ~3 km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(5 voti)
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Chaotic_Terrain-Eos_Chaos-00.jpgFeatures of Eos Chaos: Circular Butte (Original NASA/MGS/MSSS b/w Frame - 1)57 visiteOriginal caption:"This MGS-MOC image shows light-toned, Layered Rock Outcrops in Eos Chaos, located near the East end of the Valles Marineris Trough System. The Outcrops occur in the form of a distinct, circular Butte (image 1) and a high Slope (image 2). The rocks might be sedimentary rocks, similar to those found elsewhere exposed in the Valles Marineris System and the Chaotic Terrain to the East of the Region".
Location near: 12,9° South Lat. and 49,5° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Southern Summer
(5 voti)
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Craters-Airy_Crater-The_Prime_Meridian-0.JPGMars' Prime Meridian, such as: Longitude "0" (1 - Original NASA/MGS/MSSS CTX b/w Frame)65 visiteOn Earth, the Longitude of the Royal Observatory in Greenwich, England is defined as the "Prime Meridian" or the 0 point of Longitude. Locations on Earth are measured in degrees East or West from this position.
The Prime Meridian was defined by an International Agreement in 1884 as the position of the Transit Circle: a large telescope located in the Observatory's Meridian Building. The Transit Circle was built by Sir George Biddell Airy, the 7th Astronomer Royal, in 1850. While visual observations with Transit were the basis of navigation until the space age, it is interesting to note that the current definition of the Prime Meridian is in reference to orbiting satellites and Very Long Baseline Interferometry (VLBI) measurements of distant radio sources such as quasars.
However, said "International Reference Meridian" is now about 100 mt East of the Transit Circle at Greenwich.
For Mars, the Prime Meridian was first defined by German astronomers W. Beer and J. H. Mädler in 1830-32.
(5 voti)
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Meridiani_Planum_Region-PIA03650~0.jpgUnusual Landform in Meridiani Planum (Original NASA/MGS/MSSS b/w Frame)57 visiteOriginal caption:"This MGS-MOC image shows exposures of light-toned, layered, Sedimentary Rock among dark-surfaced plains in Northern Sinus Meridiani. The circular feature in the South-East (lower right) corner of the image is a wedding-cake-like tower of Sedimentary Rocks".
Location near: 2,9° North Lat. and 359,9° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
Nota: una "torre", piuttosto regolare nelle forme e presumibilmente costituita da rocce sedimentarie stratificate ed erose dal vento (e se ci pensate solo un attimo non Vi sarà difficile realizzare quanto rara possa essere una simile configurazione) viene liquidata come "torre-tipo-torta-matrimoniale". Non fraintendeteci: lo sappiamo che la banalizzazione fa parte del più recente stile NASA ma, alle volte, dopo gli assurdi nomi dati alle rocce Marziane, dopo la Hamburger-Nebula e dopo la torre a torta, ci domandiamo quali sìano mai le reali idee ed impressioni dei Signori che si occupano di questa Materia.
(5 voti)
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Isidis_Planitia.jpgMartian "Cat-paw" print - Isidis Planitia (Original NASA-MGS-MSSS b/w Frame) 63 visiteOriginal caption:"This MGS-MOC image shows a mesa in North-Eastern Isidis Planitia. The mesa might be a remnant of terrain that once more extensively covered the Region".
Location near: 20,3° North and 267,7° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
Nota: il titolo che abbiamo dato al frame è giustificato dalla formazione craterica visibile sulla mesa la quale ci ricorda, in maniera quasi perfetta, l'impronta di un felino sulla sabbia.
(5 voti)
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Craters-Eberswalde_Crater-1-PIA04293_modest.jpgEberswalde Crater and Delta in HR57 visiteOriginal caption:"Scientifically, perhaps the most important result from use of the MOC on NASA's MGS during that spacecraft's extended mission has been the discovery and documentation of a 'fossil delta'. The feature is located in a crater northeast of Holden Crater, near 24,0° South Latitude and 33,7° West Longitude. Since the announcement of the discovery of the delta in November 2003, the International Astronomical Union has provided a provisional name (pending final approval) for the crater in which the landforms occur.
The crater has been named Eberswalde (a German town).
This image offers a HR view of a portion of the fossil delta than any seen earlier. North is up. At the bottom of the frame, the image includes the north end of a looping, inverted, meandering channel. The image covers an area of about 3 by 3 Km (about 1,9x1,9 miles). It was produced using a technique called "compensated pitch and roll targeted observation," in which the rotation rate of the spacecraft is adjusted to match the ground speed under the camera. At full resolution, this map-projected image is at 50 centimeters (20 inches) per pixel".
(5 voti)
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Meridiani_Planum-Tepe-2005_09.jpg"Tepe" in Sinus Meridiani (Original NASA/MGS/MSSS b/w Frame)64 visiteOriginal caption:"This MGS-MOC image shows a lonely, light-toned Butte (----> collina "a ceppo") composed of Sedimentary Rock in Northern Sinus Meridiani. The dark landscape that surrounds the Butte was once covered by the same rocks that make up this lonely remnant".
Location near: 2,5° North Lat. and 4,2° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Autumn
(5 voti)
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Craters-Unnamed_South_Polaer_Buried_Crater-PIA04147.jpgFilled and Buried Unnamed Crater in the South Polar Region (Original NASA/MGS/MSSS b/ Frame)55 visiteOriginal caption:"This MGS-MOC image shows a Circular Depression and a suite of eroding Mesas of CO2 - features occuring in the South Polar Residual Cap of Mars. The eroding CO2 creates landforms reminiscent of 'Swiss Cheese'. The Circular Feature might indicate the location of a filled, Buried Impact Crater".
Location near: 86,8° South Lat. and 111,0° West Long.
Image width: width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Spring
(5 voti)
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Volcanic_Features-Fissure-Tharsis_Region-M0806311Det.jpgMartian "Freeway" in Tharsis Region (Original NASA/MGS/MSSS b/w Frame)55 visiteUn'autostrada Marziana (come ci piacerebbe pensare...) o un gigantesco e lunghissimo crack che attraversa la suggestiva regione dove sorgono i vulcani Ascraeus e Pavonis Montes?
Uno splendido fotogramma MGS-MOC che ci mostra l'antico letto di un fiume Marziano o, più probabilmente, il risultato di un grande evento sismico occorso in ere remote. Non possediamo informazioni al riguardo ma potrebbe anche darsi che questo grande canale sia stato disegnato, in prima battuta, da un sisma e poi sia stato "perfezionato", nella sua struttura di dettaglio, da qualche altro evento vulcanico (la Regione è quella giusta...). Le solite dune che appaiono in qualche sua sezione ci fanno anche considerare l'ipotesi che questa gola, un tempo e solo in qualche suo punto preciso, sia anche stata invasa dalle acque.
(5 voti)
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Aeolian_Features-Windstreaks-Becquerel_Crater-M0702802-00.jpgWindstreaks inside Becquerel Crater (Original NASA/MGS/MSSS b/w Frame)57 visitenessun commento
(5 voti)
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Craters-Unnamed_Crater_in_Amazonis_Planitia-M1101105.jpgUnnamed Crater in Amazonis Planitia (Original NASA/MGS/MSSS b/w Frame)55 visitenessun commento
(5 voti)
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