le dimensioni dei pianeti
http://rutube.ru/tracks/6122.html?re...19d7f877f385b8
http://rutube.ru/tracks/1143189.html...bacc754be1e0f7
le dimensioni dei pianeti
http://rutube.ru/tracks/6122.html?re...19d7f877f385b8
http://rutube.ru/tracks/1143189.html...bacc754be1e0f7
Ultima modifica di Nicolay2; 29-10-08 alle 23:59:43
ok, iniziamo le danze, immagini spettacolari da marte, (per chi pensava che la cosa più "strabiliante" fosse la faccia marziana...):
Intersecting swirling trails left by the earlier passage of dust devils across sand dunes, as they lifted lighter reddish-pink dust and exposed the darker material below. Also visible are darker slope streaks along dune edges, formed by a process which is still under investigation.
Part of the Abalos Undae dune field. The sands appear blueish because of their basaltic composition, while the lighter areas are probably covered in dust.
Avalanches on Mars' North Polar Scarps. Material, likely including fine-grained ice and dust and possibly including large blocks, has detached from a towering cliff and cascaded to the gentler slopes below. The cloud is about 180 meters (590 feet) across and extends about 190 m (625 ft) from the base of the steep cliff.
Linear dunes in the north polar region of Mars. Polygons formed by networks of cracks cover the substrate between the linear dunes and may indicate that ice-rich permafrost is present or has been present geologically recently in this location.
Scalloped sand dunes in the southern hemisphere of mars, displaying seasonal frost on the south-facing slopes, which highlights some of the regular patterns, as the frost forms only on parts of the ripples.
large barchan (crescent-shaped) dune, in a region where some dunes have been observed shrinking over several years.
Rocky mesas of Nilosyrtis Mensae region. Phyllosilicate (clay) minerals have been detected in this region by imaging spectrometers on the Mars Express and MRO spacecraft, and these minerals are of great interest in the search for evidence of life on ancient Mars.
Gullies, streaks, ripples and dust devil tracks on Russell Crater Dunes.
20A 4 km diameter feature near the edge of the south polar residual cap. The bright areas in this image are covered by carbon dioxide frost, and the "swiss cheese" terrain typical of the south polar residual cap covers much of the imaged area. The dark walls of the circular depression do not have as much frost on them, and are fractured in a polygonal pattern. Apparently the surface of the walls has been extensively modified by thermal expansion and contraction of water ice. It also appears that the "swiss cheese" terrain of the residual cap has buried the floor of the circular depression, as well as the terrain surrounding the feature, making it difficult to infer the origin of this depression.
sono rimasto a bocca aperta...
Ultima modifica di rigel; 08-11-09 alle 14:02:36
viste anche io prima dal blog di attivissimo
stupende
Il video più cool di sempre :
STS-129
http://www.youtube.com/watch?v=cxUV9Q3d64Q
non si vede