| Piú viste |
ESP_014380_1775_RED_abrowse-01.jpgExtremely Unusually-looking Skylight (SuperEDM n.1 - credits: Dr G. Barca)60 visitenessun commentoMareKromium
|
|
ESP_014307_2130_RED_abrowse.jpgLineated Valley-Fill in Nilosyrtis Region (Natural Colors; credits: Lunexit)60 visitenessun commentoMareKromium
|
|
SOL578-NAVCAM-MF.jpgPowerful Swirling Winds - Sol 578 (special process. by Marco Faccin)60 visiteUno splendido image-mosaic rappresentativo di un maestoso Dust Devil (il livello di definizione è tale per cui potete arrivare anche a distinguere la struttura "filamentosa" delle varie colonne di sabbia e polveri che si sono formate grazie alle correnti d'aria interne al DD) distante solo qualche centinaio di metri da Spirit.MareKromium
|
|
ESP_014282_0930_RED_abrowse-01.jpgSpiders (EDM - Natural Colors; credits: Lunexit)60 visiteIl bizzarro dettaglio segnalatoci dal nostro Amico e Partner, Dr Gualtiero la Fratta, non sembra risolversi in un qualcosa di agevolmente definibile: in attesa di processare la porzione di frame in oggetto dal formato JP2, quindi, possiamo solo fare due supposizioni.
La prima (razionale), in virtù della quale si può dire che stiamo osservando un image-artifact; la seconda (un pò più immaginifica) che ci suggerisce la possibilità per cui il rilievo bizzarro che si distingue davanti a noi potrebbe risolversi in due fratture lineari della supercfiie le quali - tutto sommato - potrebbero costituire due "bocche" di un medesimo geyser - di dimensioni davvero modestissime.MareKromium
|
|
Channel-CoracisFossae-BosporusPlanum-20091106b.jpgDry Riverbed and a possible Skylight (or an EXTREMELY fresh Impact Crater) between Coracis Fossae and Bosporos Planum (EDM - credits: Lunexit)60 visiteIl rilievo ambiguo è sostanzialmente indefinibile a questa risoluzione, ma la sua colorazione "pitch black" e l'apparente assenza di rim ci fa pensare ad un Pozzo Verticale da Collasso.
Le "sbavature" scure che caratterizzano l'intero versante Nord della Surface Feature e, in parte, il lato Est-Sud/Est (senza interessamento della sua zona Ovest ed Ovest-Sud/Ovest), invece, potrebbero anche far pensare ad un impatto il quale, oltre che essere occorso assai di recente, potrebbe - se non altro parzialmente - essere ricondotto alla Classe dei "Mid-Air Impact" (ossia il bolide generatore del dettaglio si sarebbe, in questo caso, parzialmente disintegrato - esploso - in prossimità del suolo, mentre una sua parte avrebbe comunque raggiunto la superficie, così creando un cratere).
L'ipotesi del Vertical Collapse Pit, comunque, ci sembra preferibile (anche se una ragionevole spiegazione delle "sbavature" scure, in questo scenario, non siamo in grado di poterla fornire).MareKromium
|
|
ESP_014417_1975_RED_abrowse-00.jpgChrise Planitia (Natural Colors; credits: Lunexit)60 visitenessun commentoMareKromium
|
|
ESP_014262_1510_RED_abrowse.jpgEjecta Blanket - West Side of Zumba Crater (Natural Colors; credits: Lunexit)60 visitenessun commentoMareKromium
|
|
ESP_014261_0930_RED_abrowse.jpgSouth Polar Residual Cap Monitoring (Natural Colors; credits: Lunexit)60 visiteThis HiRISE image is of a portion of Mars' South Polar Residual Ice Cap. Like Earth, Mars has concentrations of water ice at both Poles.
Because Mars is so much colder, however, the seasonal ice that gets deposited at high latitudes in the Winter and is removed in the Spring (generally analogous to winter-time snow on Earth) is actually Carbon Dioxide Ice. Around the South Pole there are areas of this CO2 ice that do not disappear every Spring, but rather survive Winter after Winter. This persistent Carbon Dioxide Ice is called "South Polar Residual Cap", and is what we are looking at in this HiRISE image.
Relatively high-standing smooth material is broken up by semi-circular depressions and linear, branching troughs that make a pattern resembling those of your fingerprints. The high-standing areas are thicknesses of several meters of CO2 Ice.
The depressions and troughs are thought to be caused by the removal of Carbon Dioxide Ice by Sublimation (the change of a material from solid directly to gas). HiRISE is observing this CO2 Terrain to try to determine how these patterns develop and how fast the depressions and troughs grow.
While the South Polar Residual Cap as a whole is present every year, there are certainly changes taking place within it. With the high resolution of HiRISE, we intend to measure the amount of expansion of the depressions over multiple Mars years.
Knowing the amount of Carbon Dioxide removed can give us an idea of the atmospheric, weather, and climate conditions over the course of a year.
In addition, looking for where CO2 Ice might be being deposited on top of this terrain may help us understand if there is any net loss or accumulation of the CO2 Ice over time, which would be a good indicator of whether Mars' climate is in the process of changing, or not. (Written by: Patrick Russell)MareKromium
|
|
Titan-Regions-Senkyo_Region-PIA11636.jpgThrough the Fog, in the Darkness: the Senkyo Region (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)60 visiteCaption NASA:"The low albedo feature known as Senkyo is (barely!) visible through the haze of Titan's Atmosphere.
See PIA08231 to learn about this area that appears dark near Titan's Equator. This view looks toward Saturn-facing Side of Titan and is centered on terrain at 1° South Lat. and 345° West Longitude. North on Titan is up and rotated 10° to the right.
The image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 12, 2009 using a spectral filter sensitive to wavelengths of Near-InfraRed Light centered at 938 nanometers. The view was acquired at a distance of approx. 296.000 Km (about 184.000 miles) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 11°.
Image scale is about 2 Km (approx. 1,3 mile) per pixel".MareKromium
|
|
IC-1795.jpgIC 1795 - Star Forming Region60 visite"...Come away to a deserted place, all by yourselves, and rest a while..."
- Mark 6:31MareKromium
|
|
OPP-SOL002-1P128373299EFF0200P2211L2M1.jpgEagle's Crater Rim and Greenish Sky - Sol 2 (Natural Colors; credits: Lunexit)60 visitenessun commentoMareKromium
|
|
ESP_011386_2065_and_ESP_011531_2065.jpgCollapse Features in Tractus Fossae (High-Def-3D; credits: Dr M. Faccin)60 visiteAcquisition date: 30 December 2008
Mars Local Time: 15:46 (middle afternoon)
Latitude (centered): 26,1° North
Longitude: 259,4° East
Range to target site: 281,9 Km (approx 176,2 miles)
Original image scale range: 28,2 cm/pixel (with 1 x 1 binning) so objects ~85 cm across are resolved
Map projected scale: 25 cm/pixel and North is up
Map projection: EQUIRECTANGULAR
Emission angle: 6,7°
Phase angle: 54,5°
Solar Incidence Angle: 61° (with the Sun about 29° above the Local Horizon)
Solar Longitude: 182,8° (Northern Autumn)MareKromium
|
|
| 25353 immagini su 2113 pagina(e) |
 |
|
|
|
|
1197 | |
|
|
|
|
