| Piú viste - THE LUNAR EXPLORER ARCHIVES |
as07-03-1545.jpgAS 07-03-1545 - Training around the Earth62 visite
|
|
as12_51_7541.jpgAS 12-51-7541 - Copernicus62 visite
|
|
North_Polar_Features-North_Polar_Cap-MGS.jpgAnnular Clouds over the North Pole (Natural Colors; credits: NASA/JPL/MSSS)62 visiteCaption NASA:"Two annular (---> somewhat circular) clouds are seen in the upper left corner of this mosaic of MOC wide angle camera daily global mapping images. To the right of the picture's center is the Martian North Polar Cap. The image has a scale of about 7,5 Km (about 4,7 miles) per pixel. Annular clouds are common in mid-Northern Summer in the North Polar Region and may result from eddy currents in the lower atmosphere. The appearance of such clouds happens every year; this year they came like clockwork within a two-week forecasted period, based on the previous 4 Martian Years of experience gained from MGS MOC daily global imaging.
Despite their superficial resemblance to Earth-orbiting satellite views of hurricanes, these cloud features are not the result of strong winds and they typically dissipate later in the day. The pictures used to make this mosaic were acquired less than 2 days before the MOC was turned off for MGS's 5th Mars-Earth Solar Conjunction period. During Conjunction, Mars was on the other side of the Sun, relative to Earth, and thus MGS could not transmit data (through the Sun) during the second half of October".
|
|
as09-23-3612.jpgAS 09-23-3612 - ...From above62 visiteMareKromium
|
|
as09-23-3514.jpgAS 09-23-3514 - Land and Sea62 visiteMareKromium
|
|
as09-23-3512.jpgAS 09-23-3512 - Over the Snow...62 visiteMareKromium
|
|
Ma4-06E.jpgMars from Mariner 462 visitenessun commentoMareKromium
|
|
Ma9_mtvs4167_18_(1).jpgMars from Mariner 962 visitenessun commentoMareKromium
|
|
Ma4-20E.jpgMars from Mariner 4 - Bad signal62 visitenessun commentoMareKromium
|
|
Ma4-15E.jpgMars from Mariner 462 visitenessun commentoMareKromium
|
|
Ma4-11E.jpgMars from Mariner 462 visitenessun commentoMareKromium
|
|
Gullies-Hale_Crater-R07-02277_R13-01791_S16-01780_fig.jpgGullies in Hale Crater (False Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)62 visiteThe MGS-MOC captured 2 examples of gullies on crater walls in which a change occurred between 1999 and 2005.
In each case, one in Terra Sirenum, the other in the Centauri Montes, new light-toned material was deposited during the MGS Mission. These new light-toned deposits may be indicators that water flowed at these two gully sites during the past few years. Naturally, a question arises: are there other gullies at which similar light-toned deposits have formed?
To answer the question, the MOC Team at MSSS reviewed every MOC image ever taken of a Martian Gully. Most of the gullies occur at middle latitudes in both the Northern and Southern Hemispheres. This re-examination turned up several good examples of other light-toned materials deposited in gullies. However, in none of these cases is there a “before” image, with no light-toned material, followed by an “after” image in which new light-toned material had appeared. Thus, one cannot know how long ago these other light-toned deposits formed.
However, these are excellent candidates for future monitoring with orbiter cameras that have sufficient spatial resolution to look for new light-toned deposits, should they form during the coming years.
|
|
| 3220 immagini su 269 pagina(e) |
 |
|
|
|
|
251 | |
|
|
|
|
