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Dione-PIA06155-1.jpgDione and Saturn in natural colors85 visiteCaption NASA originale:"Cassini captured Dione against the globe of Saturn as it approached the icy moon for its close rendezvous on Dec. 14, 2004. This natural color view shows the moon has strong variations in brightness across its surface, but a remarkable lack of color, compared to the warm hues of Saturn's atmosphere. Several oval-shaped storms are present in the planet's atmosphere, along with ripples and waves in the cloud bands.
The images used to create this view were obtained with the Cassini spacecraft wide-angle camera at a distance of approximately 603.000 Km from Dione through a filter sensitive to wavelengths of ultraviolet light centered at 338 nanometers. The Sun-Dione-spacecraft, or phase, angle is 34°. The image scale is about 32 Km per pixel".
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OPP-SOL330-1NN325EFF40CYLA3P0685L000M1-crop-B330R1.jpgThe Heat-Shield and its surroundings - full panorama - Sol 33085 visiteCaption NASA originale:"Mars Exploration Rover Opportunity gained this view of its own Heat-Shield during the Rover's 325th Sol (Dec. 22, 2004). The main structure from the successfully used shield is to the far left; additional fragments of the Heat-Shield lie in the upper center of the image. The Heat Shield's impact mark is visible just above and to the right of the foreground shadow of Opportunity's camera mast. This view is a mosaic of 3 images taken with the rover's NavCam". E con questo splendido ed esauriente panorama che ricopre tutta l'area d'impatto dello Scudo - dal cratere che si è formato, ai frammenti sparsi dappertutto - chiudiamo l'indagine relativa a quella che avevamo originariamente (ed erroneamente) classificato come un'Anomalia di Superficie. Fra pochi Soles, in base ai dati NASA ufficiali, Opportunity si rimetterà in marcia, dirigendosi verso Sud. Che cosa troverà , dunque, oltre alle sabbie, alle sferule ed alle curiose dunette che formano il deserto arancione di Meridiani Planum?!?...
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NGC-7009.jpgNGC 7009 - HST85 visite"...L'Universo "Spaziale"?...E' una sfera il cui centro è ovunque e la circonferenza in nessun luogo..."
Edgar Allan Poe - "Eureka"
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Miranda-PIA01354_modest.jpgMiranda (close-up of the Verona Rupes Region) - HR85 visiteCaption NASA originale:"Miranda, innermost of Uranus' large satellites, is seen at close range in this Voyager 2 image, taken Jan. 24, 1986, as part of a HR mosaicing sequence. Voyager was some 36.000 Km (22.000 miles) away from Miranda. This clear-filter, narrow-angle image shows an area about 250 Km (150 mi) across, at a resolution of about 800 meters (2.600 feet). Two distinct terrain types are visible: a rugged, higher-elevation terrain (right) and a lower, striated terrain. Numerous craters on the rugged, higher terrain indicate that it is older than the lower terrain. Several scarps, probably faults, cut the different terrains.
The impact crater in the lower part of this image is about 25 Km (15 mi) across".
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Mars-01.jpgMars' Solar Longitude 145° (1) - Tharsis Region85 visiteQueste tre immagini di Marte - riprese dalla Sonda MGS (Mars Global Surveyor) - oltre ad essere estremamente belle, ci rammentano la posizione attuale del Pianeta Rosso ed il succedersi delle sue stagioni per l'AD 2005, in accordo al Sistema "LS" o della "Longitudine Solare".
Ma che cos'è questo Sistema e come funziona?
La Longitudine Solare (o LS tout-court), oltre ad essere (ovviamente) un angolo, è anche uno strumento di misura dell'Anno Marziano.
Marte descrive un'orbita completa attorno al Sole - ossìa un giro di 360° - in "UN Anno Marziano" il quale prende avvìo alla Longitudine Solare di 0° e si completa alla Longitudine Solare di 360°.
Le stagioni Marziane, in accordo al "Sistema LS", si succedono nel modo seguente:
LS andante da 0° a 90° = Primavera a Nord ed Autunno a Sud
LS andante da 90° a 180° = Estate a Nord ed Inverno a Sud
LS andante da 180° a 270° = Autunno a Nord e Primavera a Sud
LS andante da 270° a 360° = Inverno a Nord ed Estate a Sud
Tutto chiaro?!?
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Craters-Unnamed_Craters-PIA07330.jpg"Picasso" on Mars85 visitenessun commento
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Neptune-bw-PIA02222.jpgNeptune and the "Great Dark Spot"85 visiteCaption NASA originale:"This photo was taken by Voyager 2's wide-angle camera. Light at methane wavelengths is mostly absorbed in the deeper atmosphere. The bright, white feature is a high-altitude cloud just south of the Great Dark Spot. Other, smaller clouds associated with the Great Dark Spot are white, and are also at high altitudes.
The Voyager Mission was conducted by JPL for NASA's Office of Space Science and Applications".
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OPP-SOL061-1N133613956EFF0874P1961L0M1.jpgFlat stones near Anatolia85 visitenessun commento
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Lakhshmi_Planum-PIA00249.jpgMagellan Probe: radio image of Lakhsmi Planum and Danu Montes85 visiteCaption NASA originale:"Southwest Lakshmi Planum is bounded on the south by the Danu Montes. Lakshmi Planum is an elevated plateau that is bounded on all sides by mountain chains. Here, the Danu mountains have an angular fractured appearance. Chasms slice diagonally across the mountains in the lower left (southwest) corner of the image. Because of the steep slopes and the local relief of the mountains of several kilometers, these fault-bounded troughs appear to zig-zag through the mountains when, in fact, they are probably straight if viewed from above. The radar view provides a perspective that would place the viewer's eye to the right, 27° above the horizon. Thus, slopes facing to the right can be seen completely, though dark, and slopes facing away to the left appear shortened, often seen only as thin bright lines. In the center of the image is a low volcanic dome 20 Km in diameter. This type of volcanic feature frequently occurs on the low plains. This dome on the edge of Lakshmi is deformed and faulted where it has been affected by the forces that created the Danu mountains".
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OPP-SOL006-1N128724318EFF0211P1527L0M1.jpgAirbags' Tracks - Sol 685 visitenessun commento
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OPP-SOL012-1N129255793EFF0242P1720L0M1.jpgLeaving the "nest" - Sol 1285 visiteAddio al nido!
Siamo giunti al 12mo Sol di permanenza su Marte ed è arrivato il momento di 'mettersi in marcia'. Il 'nido' è abbandonato; le prime peregrinazioni di Opportunity saranno all'interno dell'Eagle Crater e ci riserveranno subito qualche interessante sorpresa...
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OPP-SOL024-B_P2383_LanderPan-B034R1_br2.jpgChallanger Memorial Station (the "nest", in approximate true colors) - Sol 2485 visiteCaption NASA originale:"This image taken by the PanCam onboard the Mars Exploration Rover Opportunity shows the Rover's now-empty lander, the Challenger Memorial Station, at Meridiani Planum, Mars. The image was acquired on the 24th Sol of Opportunity's mission at approximately 13:00 Local Solar Time (or also Mars Local Time - MLT). This is a mosaic image consisting of 12 color images acquired with the camera's red, green and blue filters. The color balance has been set to approximate the colors that a human eye would see".
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