| |
| Piú viste - SOLAR SYSTEM |
A - Saturn-a.jpgSaturn, Tethys and Dione in almost true colors212 visiteSaturn Data and Statistics
Mass (kg) = 5.688e+26
Mass (Earth = 1) = 9,5181e+01
Equatorial radius = 60.268 Km
Equatorial radius (Earth = 1) = 9,4494e+00
Mean density (gm/cm^3) = 0,69
Mean distance from the Sun = 1.429.400.000 Km
Mean distance from the Sun (Earth = 1) = 9,5388
Rotational period (hours) = 10,233
Orbital period (years) = 29,458
Mean orbital velocity = 9,67 Km per second
Tilt of axis = 25,33°
Orbital inclination = 2,488°
Equatorial surface gravity (m/sec^2) = 9,05
Equatorial escape velocity = 35,49 Km per second
Magnitude (Vo) = 0,67
Mean cloud temperature = - 125°C
Atmospheric pressure (bars) = 1,4
Atmospheric composition: Hydrogen 97% and Helium 3%
|
|
Tethys-PIA14581-PCF-LXTT-0.jpgTethys (False b/w - credits for the additional process.: Dr Paolo C. Fienga - Lunexit Team)212 visiteCaption NASA:"Saturn's moon Tethys shows off its tortured Surface in this Cassini Spacecraft image. On the top left of the image there is huge Odysseus Crater. On the bottom right, instead, there is Ithaca Chasma: a series of Scarps that run North-to-South across the moon for more than 620 miles (approx. 1000 Km). North on Tethys is up and rotated 25° to the right. This view looks toward the area between the Leading Hemisphere and Saturn-facing side of Tethys.
The image was taken in Visible Green Light with the Cassini Spacecraft narrow-angle camera on Sept. 14, 2011. The view was acquired at a distance of approximately 178.000 miles (approx. 287.000 Km) from Tethys and at a Sun-Tethys-Spacecraft, or Phase, Angle of 11°. Image scale is about 1 mile (1,6 Km) per pixel". MareKromium
|
|
ZZ-Mercury-Volcanic_Regions-PIA10942-PCF-LXTT.jpgMercurian Volcano (Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)212 visiteAs reported in the July 4th, 2008 issue of Science Magazine, Volcanoes have been discovered on Mercury’s Surface from images acquired during MESSENGER’s first Mercury Fly-By. This image shows the largest feature identified as a Volcano in the upper center of the scene. The Volcano has a central kidney-shaped depression, which is the Vent, and a broad smooth Dome surrounding the Vent. The Volcano is located just inside the Rim of the Caloris Impact Basin. The Rim of the Basin is marked with Hills and Mountains, as visible in this image. The role of Volcanism in Mercury’s history had been previously debated, but MESSENGER’s discovery of the first identified Volcanoes on Mercury’s Surface shows that Volcanism was active in the distant past on the innermost Planet.
Date Acquired: January 14, 2008
Image Mission Elapsed Time (MET:108826877
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Resolution: 270 meters/pixel (0,17 miles/pixel)
Scale: this image is about 270 Km across (approx. 170 miles)
Spacecraft Altitude: 10.500 Km (approx. 6500 miles)MareKromium
|
|
ZZ-Mercury-Crater_Chain-PIA15156-PCF-LXTT.jpgSecondary Crater Chains (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)212 visiteThis image, taken with the Narrow Angle Camera (NAC), shows a pair of Secondary Crater Chains. These features are formed when Ejecta from a Primary iImpact is thrown outward from the growing crater cavity. As chunks of Ejecta fall back to the Surface, they can form Chains of Secondary Craters that often overlap.
This image was acquired as part of MDIS's High-Resolution Surface Morphology Base Map. The surface morphology base map will cover more than 90% of Mercury's Surface with an average resolution of approx. 250 meters/pixel (0,16 miles/pixel or 820 feet/pixel).
Images acquired for the Surface Morphology Base Map typically have off-vertical Sun angles (such as High Solar Incidence Angles, meaning low Sun over the Local Horizon ) and visible shadows so as to reveal clearly the topographic form of geologic features.
Date acquired: October 28, 2011
Image Mission Elapsed Time (MET): 228324766
Image ID: 943677
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 2,94° North
Center Longitude: 160,5° East
Resolution: 193 meters/pixel
Scale: this frame is about 100 Km (approx. 62 miles) across
Solar Incidence Angle: 87,3° (meaning that the Sun is about 2,7° above the Local Horizon)
Emission Angle: 17,3°
Sun-Mercury-MESSENGER (or "Phase") Angle: 104,7°MareKromium
|
|
Titan.jpgLanding on Titan210 visiteWill the Huygens probe land or splash down? In the next few days, the Cassini spacecraft currently orbiting Saturn will release a probe that will descend toward Saturn's largest moon in mid-January. That moon, Titan, has a surface normally hidden from view by thick methane cloud decks. What the car-sized flying-saucer-shaped probe will find is unknown. Once reaching the surface, Huygens may survive for as long as 150 minutes and take as many as 1.100 images. These images will be beamed up to the passing Cassini mothership for subsequent transmission to a waiting Earth. The Huygens probe is depicted above entering Titan's atmosphere and deploying its parachute. Uncovering the most mysterious moon in the Solar System may reveal a surface so strange that images of it may not be immediately understood.
|
|
0-Saturn and Friends.jpgSaturn and His Moons208 visiteThe dozens of moons orbiting Saturn vary drastically in shape, size, age and origin. Some of these moons have rocky surfaces, while others are porous, icy bodies. Many have craters, ridges and valleys and some show evidence of tectonic activity. Some appear to have formed billions of years ago, while others appear to be pieces of a bigger, fragmented body. The most interesting one is Titan, the biggest of them all. Larger than Earth's Moon, Titan even has its own thick atmosphere - the only natural satellite in the Solar System with such a luxury. During its 4-year mission in this immense region, the Cassini spacecraft will extensively photograph many of these moons and collect data that will increase our understanding of their composition.
To date, 34 moons have been officially named. In alphabetic order, they are: Albiorix, Atlas, Calypso, Dione , Enceladus, Epimetheus, Erriapo, Helene, Hyperion, Iapetus, Ijiraq, Janus, Kiviuq, Methone, Mimas, Mundilfari, Narvi, Paaliaq, Pallene, Pan, Pandora, Phoebe, Polydeuces, Prometheus, Rhea, Siarnaq, Skadi, Suttung, Tarvos, Telesto, Tethys, Thrym, Titan and Ymir.
|
|
004.jpgSpace Heat-Shields - The edge of Bonneville and the "wreck"208 visite4 - LA POSIZIONE
Tralasciando per il momento le altre indicazioni, prendiamo in esame la posizione 1 che, come abbiamo visto, identificherebbe l'area di impatto del (presunto) Heat-Shield con il margine del Bonneville Crater, rapportandola con la ripresa della stessa area effettuata dalla PANCAM di Spirit.
Guardate bene.
|
|
Voyagers-Heliosphere7d.pngInterstellar Space for the "Voyagers"!208 visiteAffascinante. Notizia vecchiotta (quasi di due anni), ma sempre interessante da leggere ed osservare.MareKromium
|
|
Venusian_Surface-Venera_10-00.jpgVenus from Venera 10 - October, 25, 1975 - The Original Frame207 visiteNostante la fittissima schermatura costituita dalle nuvole (35/40 Km di spessore), però, la luminosità del paesaggio su Venere sarebbe in ogni caso molto elevata. Per quanto attiene le rocce piatte riprese dal Lander Sovietico (in parte ricoperte da polveri), diremmo che si potrebbe trattare di rocce basaltiche, non troppo diverse da quelle che potremmo trovare sia su Marte, sia sulla Terra stessa, in prossimità di aree vulcaniche attive.
|
|
Phoebe and its ice crevasse.jpgPhoebe and its Icy Crevasses and Canyons207 visitenessun commento
|
|
Image035-51-Plates4B.jpgBlue Flares and the Invisible Crater: Panorama and Image from Above (2)206 visiteCome si nota facilmente, la grande (e lunga) fotografia panoramica è stata scattata a qualche metro dall'orlo di Cone Crater: giusto quanto basta per NON vederne l'interno. Plausibile? Possibile che a nessuno degli Astronauti sia venuto in mente di fare 4 passi in più per scattare anche solo una semplice foto-ricordo dell'interno di Cone Crater così da portare un "ricordino" ai Parenti?!?
A questo punto avevo in mente un'invettiva del tipo "Ma ci hanno presi tutti per degli idioti?", ma poi ho pensato che rischiavo di offendere tutti quelli che negli ultimi 35 anni non si sono accorti di queste orribili e stupidissime incongruenze...Ma bando alle polemiche! Una sola cosa � certa: nella foto panoramica il bordo occidentale del Cone Crater dovrebbe svettare per diversi metri e invece...Invece non si vede niente.
Ci siamo sbagliati?
|
|
IMAGE064-AS16-107-17419 HR-1.jpgAS 16-107-17419 (HR) - Sunstruck, Lightstruck or UFOstruck?!? (1)206 visiteGrazie alla collaborazione dell'Amico e Socio Lun-Ex-It, Fabio Italiano (SpazioUfo.com), possiamo aprire una nuova indagine partendo da un frame il quale, forse, è stato ampiamente sottovalutato. Si tratta del frame AS 16-107-17419 (il rullino 107 è stato:"Initially used by Charlie Duke during EVA-2, but mostly used by John Young from Station 4 to Station 9"). La caption NASA originale dice:"143:13:18 MT - Partial frame at the start of the roll". E' strano, innanzitutto, che, per un frame - di fatto - "venuto male", la NASA dedichi una caption e l'onore dell'Alta Risoluzione. Nessun Ricercatore (tranne l'Amico Fabio Italiano) ha mai dato peso ad immagini come questa ed anche noi, forse più per scrupolo che altro, abbiamo archiviato la problematica dopo aver contattato il Lunar and Planetary Institute (LPI) il quale, a proposito del 17419, ci ha detto "...It is an obvious (evidente) sunstruck frame, nothing more...". Un evidente frame che ha "preso luce", nulla di più.
|
|
| 4548 immagini su 379 pagina(e) |
|
|
|
|
|
12 | |
|
|
|
|
|
|
