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OPP-SOL901-PIA08753-011.jpgBeagle Crater and 360° Panorama from Sol 901 through 904 (10)55 visitenessun commento
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OPP-SOL901-PIA08753-014.jpgBeagle Crater and 360° Panorama from Sol 901 through 904 (13)55 visitenessun commento
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505-PIA00357.jpgGanymede (Enhanced Natural Colors and HR; credits: NASA/JPL)55 visiteCaption NASA originale:"This color picture of Ganymede is relevant to a Region located at 30° South Lat. and 180° West Long. It shows features as small as 6 Km (about 3,7 miles) across. Notice here a bright halo impact crater that shows the fresh material thrown out of the crater. In the background it can be seen a bright grooved terrain that may be the result of the shearing of the surface materials along fault planes.
The dark background material is the ancient heavily cratered terrain -- probably the oldest material preserved on the surface of Ganymede".
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505-PIA00356.jpgGanymede (Enhanced Natural Colors and HR; credits: NASA/JPL)55 visiteCaption NASA originale:"This color reconstruction of part of the Northern Hemisphere of Ganymede was made from pictures taken from a range of about 313.000 Km (approx. 194.000 miles).
The scene is approx. 1.300 Km (about 806 miles) across and it shows part of dark, densely cratered block which is bound on the south by lighter and less cratered, grooved terrain.
The dark blocks are believed to be the oldest parts of Ganymede's surface. Numerous craters are visible, many with central peaks. The large bright circular features have little relief and are probably the remnants of old, large craters that have been annealed by flow of the icy near-surface material.
The closely-spaced arcuate, linear features are probably analogous to similar features on Ganymede which surround a large impact basin.
The linear features here may indicate the former presence of a large impact basin to the South-West".
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The Rings-W00017896.jpgAn enormous "clump" in Saturn's Rings? No: that's Enceladus!55 visiteCaption NASA:"W00017896.jpg was taken on September 15, 2006 and received on Earth September 17, 2006. The camera was pointing toward the Rings of Saturn that, at the time, were approximately 2.227.319 Km away.
The image was taken using the CL1 and IRP90 filters. This image has not been validated or calibrated".
Wispy fingers of bright, icy material reach tens of thousands of kilometers outward from Saturn's moon Enceladus into the E-Ring, while the moon's active South Polar jets continue to fire away. This astonishing, never-before-seen structure is made visible with the Sun almost directly behind the Saturn System from Cassini's vantage point. The phase angle here is 175°, a viewing geometry in which structures made of tiny particles brighten substantially. These features are very likely the result of particles injected into Saturn orbit by the Enceladus geysers: those injected in the direction of the moon's orbital motion end up on larger, slower orbits and trail Enceladus in its orbit, and those injected into the opposite direction end up smaller, faster orbits and lead Enceladus. (Orbital motion is counter-clockwise.) In addition, the configuration of wisps may hint at an interaction between Saturn's magnetosphere and the torrent of particles issuing from Enceladus.
In addition to the wisps, another unexpected detail is the dark gore in the center of the ring, following the moon in its orbit, likely brought about by the sweeping action of Enceladus as it orbits in the center of the E ring.
The view looks down onto Enceladus (505 kilometers, or 314 miles across) from about 15 degrees above the ringplane. Tethys (1,071 kilometers, or 665 miles across) is visible to the left of Enceladus.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on Sept. 15, 2006, at a distance of approximately 2.1 million kilometers (1.3 million miles) from Enceladus. Image scale is 128 kilometers (80 miles) per pixel.
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OPP-SOL943-1N211904011EFF7600P1968R0M1.jpgThe "Rim" of Victoria Crater (1) - Sol 94355 visitenessun commento
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SOL964-2F211941015EFFAS00P1219L0M1.jpgA little movement for Spirit? - Sol 96455 visiteCaption NASA:"Left Front HazCam Non-linearized Full frame EDR acquired on Sol 964 of Spirit's mission to Gusev Crater at approx. 12:10:38 MLT.
Plans called for Spirit to acquire images of the Rover's tracks with the NavCam, take microscopic images of the Filter and Capture Magnets, and place the Alpha Particle X-ray Spectrometer on the Capture Magnet. Plans also called for the Rover to acquire Hazard Avoidance Camera images of the work volume reached by the Rover's Robotic Arm, monitor dust on the PanCam mast assembly, survey the horizon with the PanCam, and search for morning clouds with the NavCam".
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OPP-SOL943-1P211905361EFF7600P2382R2M1.jpgApproaching the "rim" of Victoria (3) - Sol 94355 visitenessun commento
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OPP-SOL943-B_P2382_R2-B943R1-1.jpgOnly 50 meters away... (1) - Sol 94355 visiteCaption NASA originale:"A drive of about 60 mt (approx. 200 feet) on the 943rd Sol, of Opportunity's exploration of Mars' Meridiani Planum Region (such as Sept. 18, 2006) brought the NASA Rover to within about 50 mt (approx. 160 feet) of the rim of Victoria Crater.
This crater has been the mission's long-term destination for the past 21 Earth months. Opportunity reached a location from which the cameras on top of the Rover's mast could begin to see into the interior of Victoria.
This frame was taken on Sol 943 by the PanCam and it shows the upper portion of interior crater walls facing toward Opportunity from up to about 850 mt (half a mile) away. The amount of vertical relief visible at the top of the interior walls from this angle is about 15 mt (roughly 50 feet). The exposure was taken through a PanCam filter selecting wavelengths centered on 750 nanometers".
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OPP-SOL943-B_P2382_R2-B943R1-2.jpgOnly 50 meters away... (2) - Sol 94355 visiteCaption NASA originale:"Victoria Crater is about five times wider than Endurance Crater - which Opportunity spent six months examining in 2004 - and about 40 times wider than Eagle Crater, where Opportunity first landed. The great lure of Victoria is the expectation that a thick stack of geological layers will be exposed in the crater walls, potentially several times the thickness that was previously studied at Endurance and therefore, potentially preserving several times the historical record".
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OPP-SOL947-1P212252951ESF7600P2584R4M1.jpgMartian Paving near Victoria (1) - Sol 94755 visitenessun commento
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OPP-SOL948-1N212349063EFF76ACP0665L0M1.jpgVictoria Crater (1) - Sol 94855 visiteCaption NASA:"Left NavCam Non-linearized Full frame EDR acquired on Sol 948 of Opportunity's mission to Meridiani Planum at approximately 14:27:07 MLT".
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