| Piú viste - A Tribute To Mars Global Surveyor |
Martian_Limb-MGS-E23-00100_limb-01.jpgMartian Limb, Clouds, Haze and Outer Space (Original NASA/MGS/MSSS b/w Frame)129 visiteCaption originale:"Mars Global Surveyor orbits the Red Planet 12 times each day. Half of each orbit is spent on the day side of Mars, which is where most Mars Orbiter Camera images are obtained because sunlight is required to illuminate the Surfaces being observed. However, on the night side of Mars, the wide angle cameras can see clouds and hazes above the sunward Martian Limb. This blue wide angle camera image, obtained on the night side of Mars on May 15, 2003, shows Clouds picking up the first sunlight before dawn near 55° North Latitude. The scene is illuminated by sunlight from the right. The Sun is actually on the other side of the Planet and has not yet risen over this Region. The dark area on the left side of the picture is the Martian Surface at night. The dark band on the right side is Outer Space. The bright features just right of center are the Clouds hanging above the Martian Limb over Mars' Northern Plains. North is up and the Spacecraft was moving Southward when the image was acquired".
|
|
Craters-Unnamed_Crater_in_Terra_Tyrrhena-02.jpgUnnamed Crater and Dunes in Terra Tyrrhena (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)128 visiteCaption originale:"This MGS-MOC image shows a portion of a Field of Dark Sand Dunes superposed on the light-toned Floor of an Unnamed Crater in Eastern Tyrrhena Terra. The orientation of the Dunes — with the steep faces toward the South — suggests that winds generally blew from North to South at the time the Dunes were formed".
Location near: 14,6° South Lat. and 262,3° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Southern SummerMareKromium
|
|
Hellas_Planitia.jpgHellas Planitia in Winter (Natural Colors; credits: NASA/MGS/MSSS)126 visite"This picture captures two dust storms, each large enough to cover Arizona or New Mexico. One is located near the lower left, the other at the lower right. Taken on April 8, 2001 (Mid-Southern Winter), this is a mosaic of six MOC daily global images centered around Hellas Planitia in the Martian Southern Hemisphere. Hellas Planitia is the dominant elliptical feature just below the center of the picture. The bright, nearly white surfaces along the lower (southern) edge of the picture are covered by wintertime frost. The strong temperature difference between the winter frost and the warmer air just off the edge of this Polar Cap generates winds that - at this time of year - are often strong enough to lift Dust into large, reddish-brown, billowy clouds".
|
|
Volcanoes-Olympus_Mons-PCF-LXTT-2.jpgOlympus Mons, from MGS (Natural Colors; credits: NASA & Lunar Explorer Italia)126 visitenessun commentoMareKromium
|
|
Craters-Gusev_Crater-R1300473_474.jpgGusev Crater Landscape from MGS (Extremely Enhanced Natural Colors; credits:NASA/JPL-MSSS)125 visiteSi tratta di un'immagine a colori ad HD semplicemente fantastica, ottenuta dalla Sonda Mars Global Surveyor e relativa (in parte) all'area di lavoro di Spirit. Abbiamo scelto di mostrarVi questo frame per almeno 3 buoni motivi: 1) perchè si tratta di un frame bellissimo; 2) perchè ci fa vedere bene i "colori di Marte" (che, dall'alto, sembrano diversi da quanto ci mostrano le Sonde che stazionano sulla superficie e 3) perchè ci aiuta a cogliere, usando i nostri occhi, la sensazione che proveremmo se ci trovassimo fisicamente su una nave spaziale, in orbita intorno a Marte.
|
|
Controversial_Features-The_D_M_Pyramid-01.gifThe D&M Pyramid (High-Def-3D)125 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...
|
|
Craters-Crater_Cluster-Meridiani_Planum-PIA07151_modest-01.jpgCrater Cluster in Meridiani Planum (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)125 visitenessun commentoMareKromium
|
|
Craters-Unnamed_Crater-North_Polar_Regions-MGS-2.jpgUnnamed Crater in the Northern Plains (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)123 visitenessun commentoMareKromium
|
|
Channels-Unnamed_Channel_near_Cydonia_Region-PIA07272-00.jpgArabia Terra, near Cydonia Region: the "Sphynx" River (Original NASA/MGS/MSSS b/w Frame)120 visiteE' davvero gratificante (e difficile) commentare immagini di simile impatto e bellezza: stiamo osservando il letto, ormai prosciugato (ma con degli abbondanti depositi di "qualcosa" che è rimasto adagiato e ben visibile sul fondo - forse fango?), di un antico fiume Marziano. Siamo nella pianura conosciuta come Arabia Terra, in prossimità della famosissima Cydonia Mensae.
Dato che questo fiume (a quanto ne sappiamo) passa attraverso la Regione di Cydonia, abbiamo deciso di chiamarlo, in omaggio ai "monumenti" che molti pensano si trovino in quella misteriosa zona di Marte, "Sphynx River": il Fiume della Sfinge.
Con buona pace, ovviamente, degli Amici della NASA...
|
|
Volcanic_Features-Pits-Ascraeus_Mons-PIA07313-01.jpgAscraeus Mons' Pit Chain (EDM/HD - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows Collapse Pits on the Northern Flank of the giant Tharsis Shield-Volcano, Ascraeus Mons. Details in Rock and Dust are seen when this image is examined at its full, 1,5 meters (5 ft) per pixel resolution. Large, dark Boulders occur on the Floors of some of the Pits, for example. This scene is located near 13,1° North Lat. and 103,1° West Long. The picture covers an area of about 3 Km (such as approx. 1,9 mi) wide".
|
|
South_Polar_Regions-PIA04162.jpgDefrosting South Polar Region (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visiteOriginal caption:"This MGS-MOC image shows varied springtime patterns formed in defrosting, seasonal carbon dioxide frost in the South Polar Region of Mars. The feature sporting an outline of dark spots and an interior of smaller, closely-spaced dark spots and dark-outlined polygons is a patch of windblown or wind-eroded sand that was covered by carbon dioxide frost during the previous autumn and winter. The fainter, larger polygon pattern on either side of the patch of defrosting sand is formed in the substrate upon which the sand patch is sitting. Polygonal forms such as these might indicate the presence of ice below the surface".
Location near: 79,6°S; 125,0°W
Image width: width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern SpringMareKromium
|
|
Craters-Unnamed_Crater-PIA06699-PCF-LXTT.jpgDark Slope Streaks (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visiteCaption NASA:"Dark Slope Streaks are a common feature on the Slopes thickly-mantled by Dust in the Tharsis, Arabia, and Western Amazonis Planitia egions of Mars. Less common are light-toned Slope Streaks, which often occur in the same area as Dark Streaks. They are most common in Arabia Terra, and some are shown in this MGS image. Slope Streaks are probably the result of sudden Avalanches of extremely dry Dust. The behavior of the avalanching dust is somewhat fluid-like and it is a phenomenon often observed during the Martian year.
MareKromium
|
|
| 512 immagini su 43 pagina(e) |
 |
|
|
|
|
13 | |
|
|
|
|
