| Piú viste |
Dione-PIA09861.jpgDione60 visiteCaption NASA:"This southerly view of Dione shows enormous canyons extending from Mid-Latitudes on the Trailing Hemisphere, at right, to the moon's South Polar Region.
This view looks toward the Saturn-facing side of Dione (about 1126 Km, or 700 miles across) and is centered on 22° South Latitude, 359° West Longitude. North on Dione is up; the moon's south pole is seen at bottom.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 8, 2008. The view was obtained at a distance of approx. 211.000 Km (such as about 131.000 miles) from Dione and at a Sun-Dione-Spacecraft, or phase, angle of 20°.
Image scale is roughly 1 Km (0,6 mile) per pixel".MareKromium
|
|
APOLLO_14_AS_14-77-10358a.JPGAS 14-77-10358 (a) - Lunar Bootprint60 visiteAstronaut bootprint; taken at at a location midway between the LM and Station "A".MareKromium
|
|
SOL422-1.jpgSolar Panels, Rover Tracks and "Brown Dust" - Sol 422 (True Colors; credits: Dr Gianluigi Barca)60 visitenessun commentoMareKromium
|
|
Enceladus-PIA10356.jpgWhat's in "Enceladus Plume"?60 visiteCaption NASA:"The lower panel is a Mass Spectrum that shows the chemical constituents sampled in Enceladus' plume by Cassini's Ion and Neutral Mass Spectrometer during its fly-through of the plume on Mar. 12, 2008.
Shown are the amounts, in atomic mass per elementary charge (Daltons [Da]), of Water Vapor, Methane, Carbon Monoxide, Carbon Dioxide, simple organics and complex organics identified in the plume".MareKromium
|
|
SOU-SOL019-81945_full.jpgThe Spectral Mapping of the Soujourner-Pathfinder Landing Site - Sol 19 (credits: NASA)60 visitenessun commentoMareKromium
|
|
SOU-SOL018-82016_full.jpgWeathered and UN-weathered Rocks and Soil: "Ginger"- Sol 18 (credits: NASA)60 visiteCaption NASA:"One of the more unusual rocks at the site is Ginger, located South-East of the Lander.
Parts of it have the reddest color of any material in view, whereas its rounded lobes are gray and relatively unweathered. These color differences are brought out in the inset, enhaced at the upper right. In the false color image at the lower right, the shape of the visible - wavelength spectrum (related to the abundance of weathered ferric iron minerals) is indicated by the hue of the rocks.
Blue indicates relatively unweathered rocks. Typical soils and drift, which are heavily weathered, are shown in green and flesh tones.
The very red color in the creases in the rock surface correspond to a crust of ferric minerals.
The origin of the rock is uncertain; the ferric crust may have grown underneath the rock, or it may cement pebbles together into a conglomerate. Ginger will be a target of future super- resolution studies to better constrain its origin".MareKromium
|
|
SOU-SOL079-TwinPeaks_right.jpgTwin Peaks...In the distance - Sol 7960 visitenessun commentoMareKromium
|
|
PSP_007653_2010_RED_abrowse-00.jpgBright on Dark (MULTISPECTRUM; credits: Lunexit)60 visiteThis image reveals bright Slope Streaks in Bahram Vallis, a long sinuous valley that winds across North-Eastern Lunae Planum and Xanthe Terra to the circum-Chyrse basin.
Typically, dark and light-toned Slope Streaks appear together on light-toned slopes. This scene is a rare case in which only bright streaks are visible on a dark surface. Slope Streaks generally start at a point source and widen downslope as a single streak or branch into multiple streaks. Some of the Slope Streaks show evidence that downslope movement is being diverted around obstacles, such as large boulders, and a few appear to originate at boulders or clumps of rocky material.
Many hypotheses have been proposed for the formation of slope streaks including dry avalanching, geochemical weathering, liquid stains or flows, and moisture wickering. Recent observations from HiRISE images have revealed that the interior of Slope Streaks is lower in elevation than the surroundings indicating that material must have been removed and then deposited in the formation of the streak.
Slope Streak formation is among the few known processes currently active on Mars. Where they appear together, dark Slope Streaks cross cut and lie on top of the older and lighter-toned streaks leading to the belief that lighter-toned streaks are dark streaks that have lightened with time as new dust settled on their surface. Over the course of several years, MOC images from this Region did not reveal any new dark or light-toned Slope Streaks suggesting that streak formation is not currently active here.
HiRISE will continue to monitor this Region for new slope streaks and changes in tone of old streaks.MareKromium
|
|
Craters-Unnamed_Double_Crater_in_Terra_Tyrrhena.jpgDouble Impact Crater in Terra Tyrrhena (Natural Colors + MULTISPECTRUM; credits: ESA & Lunexit)60 visiteThe High Resolution Stereo Camera (HRSC), ESA’s Mars Express obtained images of the Tyrrhena Terra Impact Region on Mars.
On 10 May 2007, the spacecraft was in orbit number 4294 when it snapped pictures of the Region located at 18° South Lat. and 99° East Long. with a ground resolution of approximately 15 metres per pixel.
The Western part of the scene is dominated by a 35 Km-wide and approx. 1000 mt-deep impact crater with an extremely cliffy and chiseled edge. Another, 18 Km-long and approx. 750 mt-deep impact crater, in all likelihood a ‘double impact crater’, is located South of the large crater.
These 'double impact craters' develop when two objects, part of a binary, hit the surface almost simultaneously.MareKromium
|
|
SOL236.jpgEvening Shadow... - Sol 236 (natural colors + MULTISPECTRUM; credits: Dr M. Faccin & Lunexit)60 visitenessun commentoMareKromium
|
|
PSP_007769_9010_IRB.jpgPhobos (Natural Colors; credits: NASA)60 visiteHiRISE acquired 2 dramatic views of the Martian moon, Phobos, on 23 March 2008. Observation PSP_007769_9010, acquired at a distance of 6800 Km from Phobos, provides surface detail at 6,8 mt/pixel scale and a object diameter of about 3200 pixels.
The second observation, PSP_007769_9015, providing a closer look at 5800 Km, views the surface at slightly more detail (5,8 mt/pixel with an object diameter of about 4000 pixels).
The 2 images were taken within 10' of each other and show roughly the same features, but from a different angle so that they can be combined to yield a stereo view.
The illuminated part of Phobos visible in the images is about 21 Km across. Images from previous spacecraft have been of smaller pixel scale (for example, Mars Global Surveyor got data at 4 mt/pixel, because this spacecraft came closer to Phobos), but the HiRISE images have greater signal-to-noise, making the new data some of the best ever for Phobos.MareKromium
|
|
Sun-N00107152.jpgSunshine through the Rings... (natural colors; credits: Lunexit)60 visiteCaption NASA:"Caption NASA:"N00107152.jpg was taken on April 10, 2008 and received on Earth on April 11, 2008. The camera was pointing toward SATURN, F-RING that, at the time, was approx. 611.114 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".MareKromium
|
|
| 25353 immagini su 2113 pagina(e) |
 |
|
|
|
|
1236 | |
|
|
|
|
