| Piú viste |
SOL1180-GB-LXT.jpgPeaceful Horizon - Sol 1180 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
SOL1899-PIA12007.jpgSpirit's "Soft-Sand Grave" - Sol 189956 visiteCaption NASA:"Wheel slippage during attempts to extricate NASA's Mars Rover Spirit from a patch of soft ground during the preceding two weeks had partially buried the wheels by the 1899th Martian Day, or Sol, of the Spirit's Mission on Mars (May 6, 2009). Spirit took this image with its Front HazCam on Sol 1899. With Spirit in the position shown here, the Rover Team temporarily suspended driving attempts while studying the ground around Spirit and planning simulation tests of driving options with a test rover at NASA's Jet Propulsion Laboratory in Pasadena, Calif.
Driving attempts between the time Spirit took a similar image (see PIA12002) 10 Soles earlier and when this image was taken moved the Rover a total of about 36 cm (such as abut 14").
While driving backwards, the Rover drags its right front wheel, which no longer rotates. For scale, the distance between the Wheel Tracks is about 1 meter (40"). This view is looking Northward, with Husband Hill on the horizon".MareKromium
|
|
OPP-SOL1886-1M295614429EFFA0__P2956M2M1.jpgMartian Granite? - Sol 1886 (Natural Colors; credits: Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
ESP_012941_0930_RED_abrowse.jpgLandforms on the South Polar Residual Cap (Natural Colors; credits: Lunar Explerer Italia)56 visiteThis HiRISE image is located on the Carbon-Dioxide (CO2) rich Residual South Polar Ice Cap near 86° South Lat. and 353° East Long.
These rounded landforms evolve relatively quickly and erode into the surface of the Ice Cap (approximately 4-5 meters or 15 feet per year).
Their interesting shapes make for a striking appearance on the Surface.MareKromium
|
|
SOL1907-2N295663976EFFB1DNP1902R0M1.jpgPale Sun over Gusev Crater - Sol 1907 (Natural Colors; credits: Lunar Explorer Italia)56 visiteSpirit is embedded in loose, soft terrain on the west side of Home Plate. There is a real risk the Rover may be high-centered (underside touching) on a small mound of rocks right under its belly. Additionally, a left wheel motor stall occurred during the last Rover motion on Sol 1899 (May 6, 2009). No motion has been commanded since.
The project is engaged in a recovery activity. This involves extensive remote sensing observations by the rover of the local soil characteristics, and ground testing using the surface system testbed rover in the sandbox at JPL.
There has been no recurrence of the anomalous behavior that happened between Sol 1872 (April 9, 2009) and Sol 1881 (April 18, 2009). There is still no explanation for the previous anomalies, and the investigation is continuing.
The week provided more good news about solar array energy. Spirit experienced yet another substantial solar array dust cleaning event. On Sol 1900 (May 7, 2009), energy production improved by about 30 percent. With the significant improvement in energy, the rover can now support morning UHF relay passes, which will help with the backlog of collected data onboard. The Mars Odyssey project has made special efforts to support this additional relay.
As of Sol 1905 (May 13, 2009), solar array energy production is estimated around 652 watt-hours, with atmospheric opacity (Tau) at 0,774. The dust factor has improved substantially to 0,678, meaning that 67,8% of Sunlight hitting the solar array penetrates the layer of dust on the array. As of Sol 1906 (May 14, 2009), Spirit's total odometry remains 7729,93 meters (4,8 miles).MareKromium
|
|
SOL1902-ALLFILTERS-MF.jpgMartian Salts - Sol 1902 (Natural Colors; credits: Dr M. Faccin & Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
SOL1103-GB-LXT.jpgSalts inside the Rover Tracks - Sol 1103 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
PSP_010100_2165_RED_abrowse.jpgEjecta Blanket (Natural Colors; credits: Lunar Explorer Italia)56 visiteThis image of a crater in the Utopian Region can be described as what happens when heat produced from an impact comes into contact with Mars’ icy Surface.
Since the Surface Temperature of Mars is well below the freezing point of water, Mars’ soil is a mixture of soil and permafrost. When this impact occurred, a great deal of energy in the form of heat was released onto the Surface, creating a melted feature in the bright icy soil. This melting and then refreezing of the ice (as the impact cooled) caused what is known as a "Periglacial Formation". This is depicted towards the middle of the image where the Ejecta Blanket lays.
This is likely a geologically newer surface since the only impacts disrupting the image are a few small craters that are mostly towards the bottom left-hand side of the full image.
The fact the Ejecta Blanket is still intact and not fully collapsed supports the idea that is it a newer surface feature as it has not been affected by erosional processes.MareKromium
|
|
Eclipse-N00136236.gifEclipse... (GIF-Movie; credits: Dr G. Barca)56 visiteUno spettacolare GIF-Movie realizzato dal nostro (sempre più bravo) Dr Barca il quale ci mostra una stupenda eclissi mentre si materializza davanti agli "occhi elettronici" dell'Orbiter CASSINI.
Un "commento"? Ecco lo Spazio: l'Ultima Frontiera. La VERA e l'UNICA Ultima Frontiera.MareKromium
|
|
The_Rings-PIA11498.jpgShadow on the Rings (Natural Colors; credits: Lunar Explorer Italia)56 visiteCaption NASA:"The partial shadow of the moon Tethys demonstrates the variations in density across Saturn's Rings.
As the Cassini Spacecraft looks toward the unilluminated side of the Rings from about 37° above the Ring-Plane, part of Tethys' shadow is seen lying across the A-Ring and Cassini Division. The densest part of the A-Ring and the denser B-Ring let neither sunlight nor the darkness of Tethys' shadow pass through to the Spacecraft's camera, so the moon's shadow appears cut off. The B-Ring instead appears brightly lit here from Saturnshine. Tethys is not shown.
As Saturn approaches its August 2009 Equinox, the planet's moons cast shadows onto the Rings. (...)
The image was taken in Visible Light with the Cassini Spacecraft wide-angle camera on April 17, 2009. The view was obtained at a distance of approx. 1,3 MKM (about 808.000 miles) from Saturn and at a Phase Angle of 120°.
Image scale is roughly 75 Km (about 47 miles) per pixel".MareKromium
|
|
SOL1123-GB-LXT.jpgThe "soft" Colors of Gusev Crater - Sol 1123 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
SOL1081-GB-LXT.jpgEl Dorado Dunefield - Sol 1081 (Natural Colors; credits: Dr G. Barca & Lunar Explorer Italia)56 visitenessun commentoMareKromium
|
|
| 25353 immagini su 2113 pagina(e) |
 |
|
|
|
|
1681 | |
|
|
|
|
