| Piú votate - From Ashes to Eternity: the Phoenix Mars Mission |
PHOE-SOL129-lg38029-38059-38060-2.jpgColourful Shades in the Trench - Sol 129 (possible True Colors; credits: Dr G. Barca)54 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL122-lg36292-36293-36294-2.jpgMicroscopic Vastitas - Sol 122 (Superdefinition and possible True Colors; credits: Dr G. Barca & Lunexit)56 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL119-MF-LXT.jpgMorning Frost over Vastitas - Sol 119 (natural colors; credits: Dr M. Faccin)56 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL117-PIA11191.jpg"Headless": just like NASA... - Sol 11754 visiteCaption NASA:"The Robotic Arm on NASA's Phoenix Mars Lander slid a rock out of the way during the mission's 117th Sol (such as Sept. 22, 2008) to gain access to soil that had been underneath the rock.The Lander's Surface Stereo Imager took the two images for this stereo view later the same day, showing the rock, called "Headless", after the arm pushed it about 40 cm (16") from its previous location.
"The rock ended up exactly where we intended it to", said Matt Robinson of NASA's Jet Propulsion Laboratory, RA flight software lead for the Phoenix team.
The RA had enlarged the trench near Headless 2 days earlier in preparation for sliding the rock into the trench. The trench was dug to about 3 cm (1,2") deep. The ground surface between the rock's prior position and the lip of the trench had a slope of about 3° downward toward the trench.
Headless is about the size and shape of a VHS videotape".MareKromium
(5 voti)
|
|
PHOE-SOL115-lg33948-33951-33952-2.jpgThe Surface of Vastitas Borealis - Sol 115 (Superdefinition and possible True Colors; credits: Dr G. Barca)54 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL108-lg31337-31338-31339-2.jpgDetails of the Phoenix Lander - Sol 108 (Superdefinition and natural colors; credits: Dr G. Barca)54 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL104-PIA11155-GIF.gifLate, once again! - Sol 104 (GIF-Movie; credits: NASA/JPL-Caltech/University of Arizona/Texas A&M University)73 visiteCon quattro giorni di ritardo rispetto alla pubblicazione operata da Lunar Explorer Italia di un filmato GIF prodotto dal Dr Barca e relativo al MEDESIMO fenomeno, anche i nostri Amici di Pasadena hanno pensato di elargirci il loro filmatino che ritrae un Dust Devil mentre passa non lontano dal Phoenix Lander.
La NASA ci legge? Ma certo che ci legge, e noi ne siamo onorati! E comunque sia, vedere che alla NASA arrivano (quantomeno nelle pubblicazioni divulgative) spessissimo - anzi: quasi sempre - DOPO di noi, è comunque una fonte di enorme soddisfazione: umana e professionale.
Ed eccoVi la caption NASA al filmino:"The Surface Stereo Imager on NASA's Phoenix Mars Lander caught this Dust Devil (a.k.a.: "DD" or "DDs", for the plural) in action West of the Lander in four frames shot about 50 seconds apart from each other between 11:53 and 11:56 M.L.T. Sol 104, or the 104th Martian day of the mission - such as Sept. 9, 2008).
DDs have not been detected in any Phoenix images from earlier in the Mission, but at least six were observed in a dozen images taken on Sol 104.
Dust Devils are whirlwinds that often occur when the Sun heats the surface of Mars, or some areas on Earth. The warmed surface heats the layer of atmosphere closest to it, and the warm air rises in a whirling motion, stirring dust up from the surface like a miniature tornado.
The DD visible in this sequence was about 1 Km (about 3300 feet) from the Lander when the first frame was taken, and had moved to about 1700 meters (about 5600 feet) away by the time the last frame was taken about two and a half minutes later. The DD was moving Westward at an estimated speed of 5 meters per second (such as abou 11 mph), which is similar to typical late-morning wind speed and direction indicated by the Telltale Wind Gauge - such as the Anemomether) on Phoenix.
This Dust Devil is about 5 meters (16 feet) in diameter. This is much smaller than DDs that have been observed by NASA's Mars Exploration Rover Spirit much closer to the Equator. It is closer in size to DDs seen from orbit in the Phoenix Landing Region, though still smaller than those..
The image has been enhanced to make the Dust Devil easier to see. Some of the frame-to-frame differences in the appearance of foreground rocks is because each frame was taken through a different color filter". MareKromium
(5 voti)
|
|
PHOE-SOL095-PIA11151-GIF.gifNight-Clouds over Vastitas - Sol 95 (GIF-Movie; credits: NASA/JPL-Caltech/University of Arizona/Texas A&M University )54 visiteAn angry looking sky is captured in a movie clip consisting of 10 frames taken by the Surface Stereo Imager on NASA's Phoenix Mars Lander.
The clip accelerates the motion. The images were take around 03:00 M.L.T. at the Phoenix Site during Sol 95 (Aug. 30), the 95th Martian day since landing.
The swirling clouds may be moving generally in a Westward direction over the Lander.
MareKromium
(5 voti)
|
|
PHOE-SOL101-lg_29677.jpgPre-Dawn Lights and Clouds - Sol 101 (original - True Colors; credits: Lunexit)67 visitenessun commentoMareKromium
(5 voti)
|
|
PHOE-SOL094-PIA11060.gifIce Clouds over Vastitas - Sol 94 (GIF-Movie; credits: NASA)54 visiteClouds scoot across the Martian Sky in a movie clip consisting of 10 frames taken by the Surface Stereo Imager on NASA's Phoenix Mars Lander.
This clip accelerates the motion. The camera took these 10 frames over a 10-minute period from 14:52 to 15:02 M.LT. at the Phoenix Site during Sol 94 (Aug. 29), the 94th Martian day since landing.
Particles of water-ice make up these clouds, like ice-crystal cirrus clouds on Earth. Ice hazes have been common at the Phoenix site in recent days. The camera took these images as part of a campaign by the Phoenix team to see clouds and track winds. The view is toward slightly West of due South, so the clouds are moving Westward or West-NorthWestward.
The clouds are a dramatic visualization of the Martian Water Cycle. The water vapor comes off the North Pole during the peak of Summer. The Northern-Mars Summer has just passed its peak water-vapor abundance at the Phoenix Site. The atmospheric water is available to form into clouds, fog and frost, such as the Lander has been observing recently. MareKromium
(5 voti)
|
|
PHOE-SOL088-PIA11058.jpgMartian "Caterpillar" - Sol 88 (natural colors; credits: Lunexit)54 visiteAs NASA's Phoenix Mars Lander excavates trenches, it also builds piles with most of the material scooped from the holes. The piles, like this one called "Caterpillar", provide researchers some information about the soil.
On Aug. 24, 2008, during the late afternoon of the 88th Martian day after landing, Phoenix's Surface Stereo Imager took separate exposures through red, green and blue filters that have been combined into this approximately true-color image. This conical pile of soil is about 10 cm (4") tall.
The sources of material that the Robotic Arm has dropped onto the Caterpillar pile have included the "Dodo" and ""Upper Cupboard" trenches and, more recently, the deeper "Stone Soup" trench.
Observations of the pile provide information, such as the slope of the cone and the textures of the soil, that helps scientists understand properties of material excavated from the trenches.
For the Stone Soup trench in particular, which is about 18 cm (7") deep, the bottom of the trench is in shadow and more difficult to observe than other trenches that Phoenix has dug. The Phoenix team obtained spectral clues about the composition of material from the bottom of Stone Soup by photographing Caterpillar through 15 different filters of the Surface Stereo Imager when the pile was covered in freshly excavated material from the trench.
The spectral observation did not produce any sign of water-ice, just typical soil for the site. However, the bigger clumps do show a platy texture that could be consistent with elevated concentration of salts in the soil from deep in Stone Soup. The team chose that location as the source for a soil sample to be analyzed in the lander's wet chemistry laboratory, which can identify soluble salts in the soil.MareKromium
(5 voti)
|
|
PHOE-SOL090-PIA11054-1.jpgStar-like Objects in the Morning Lights - Sol 9054 visitenessun commentoMareKromium
(5 voti)
|
|
| 403 immagini su 34 pagina(e) |
 |
|
|
|
|
8 | |
|
|
|
|
