| Risultati della ricerca nelle immagini - "A"" |
011-vg2_p23927.jpgThe texture of the Rings (false colors - detail mgnf)56 visitenessun commento
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APOLLO 15 AS 15-2405.jpgAS 15-2405 - Craters Messier and Messier "A"55 visiteMessier (1) and Messier A (2) are a pair of unusual craters in North-Western Mare Fecunditatis. Messier is elliptical and has bright walls and light rays of ejecta extending at right angles to its long axis (approx. 16,5 Km). Messier A is a doublet crater having two very long rays or filaments of ejecta extending Westward from it. The east part of the doublet has steep, bright walls, whereas the west part is dark and appears mantled. Differences between the two parts are more clearly shown in this oblique view of Messier A (see AS 16-4471). Both craters resemble some small experimental impact craters produced in sand by projectiles following shallow trajectories (4° or less from the horizontal) at velocities of approximately 1,7 Km/s. In separate experiments using single projectiles, both elliptical craters with lateral ejecta lobes and doublet craters have been produced. Thus, it can be inferred that these lunar craters were produced by high velocity projectiles following shallow trajectories. By further analogy with the experiments, the projectiles that formed Messier and Messier A apparently traveled from east to west".
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APOLLO 16 AS 16-120-19281.jpgAS 16-120-19224 - Moonscape from orbit (3)134 visitenessun commento
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APOLLO 16 AS 16-120-19295.jpgAS 16-120-19295 - Moonscape from orbit (4)125 visitenessun commento
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APOLLO 16 AS 16-4471.jpgAS 16-4469 and AS 16-4471 - Crater Messier "A" (stereo pair)69 visitenessun commento
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APOLLO_15_-_AS15-87-11701_HR.jpgAS 15-87-11701 - Macrobius Crater ("A" and "B")152 visitenessun commentoMareKromium
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APOLLO_15_-_AS15-87-11703_HR.jpgAS 15-87-11703 - Macrobius Crater ("A" and "B")153 visitenessun commentoMareKromium
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APOLLO_15_AS_15-95-12953.jpgAS 15-95-12953 - Prinz "A"57 visiteCoord.: 26,5° North Lat. and 44,0° West Long.MareKromium
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APOLLO_15_AS_15-M-R34-1428.jpgAS 15-M-R34-1428 - Archimedes "A"61 visiteCoord.: 26° North Lat. and 7,5° West Long.
Lens Focal Length: 3"
Camera Tilt: 25°
Camera Azimuth: 95
Camera Altitude: 103 Km
Sun Elevation (on local horizon): 20° MareKromium
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APOLLO_15_AS_15-M-R70-2406.jpgAS 15-M-R70-2406 - Messier, Messier "A" and Messier "B" Craters63 visiteCoord.: 1° South Lat. and 45,5° East Long
Lens Focal Length: 3"
Camera Tilt: VERT
Camera Altitude: 120 Km
Sun Elevation (on local horizon): 68°
Nota: un caso - davvero spettacolare ed eclatante (nonchè, ad oggi, inspiegato) - di Lunar "Wind-Streaks". Provate a verificare questo (double) streak con l'ampia trama di streaks che circonda una buona metà del Cratere Menelaus.
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Daphnis-PIA11637.jpgHeavy Disturbances56 visiteCaption NASA:"This Cassini image, which at first appears to show a serene scene, in fact reveals dramatic disturbances created in Saturn's A-Ring by its moon Daphnis.
Near the center of the image, tiny Daphnis (about 8 Km across) appears as a bright dot in the Keeler Gap near the edge waves it has created in the A-Ring. The moon has an inclined orbit and its gravitational pull both perturbs the orbits of the particles of the A-Ring forming the Keeler Gap's edge and sculpts the edge into waves having both horizontal (radial) and out-of-plane components. Material on the inner edge of the gap orbits faster than the moon so that the waves there lead the moon in its orbit. Material on the outer edge moves slower than the moon, so waves there trail the moon.
Epimetheus (approx. 113 Km, or about 70 miles across) orbits beyond the F-Ring at the bottom of the image. Bright specks in the image are background stars.
This view looks toward the Northern, sunlit side of the Rings, from about 11° above the Ring-Plane.
The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on Sept. 24, 2009. The view was obtained at a distance of approx. 1,8 MKM (about 1,1 MMs) from Daphnis.
Image scale is roughly 11 Km (a little less than 7 miles) per pixel".MareKromium
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OPP-SOL2811-17-2.jpgThe dusty "NASA" Logo - Sol 2811 (Enhanced Natural Colors; credits for the additional process. and color.: Dr Gianluigi Barca - Lunexit Team)95 visitenessun commentoMareKromium
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