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as13-62-8930.jpgAS 13-62-8930 - The "home-made" Air-Cleaning Device (2)55 visiteCaption NASA originale:"Inflight photo of the device constructed by the Crew from duct tape, maps and other materials they had on hand as per instructions provided by Houston.
This device allowed use of box-shaped Command Module Lithium Hydroxide canisters in conjunction with the LM Environmental Control System, which is the large white unit that fills most of the frame. The LM LiOH canisters were cylindrical in shape and fit into the receptacles at the lower left. Compare with the LM-ECS diagram".MareKromium
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The_Rings-PIA08825.jpgBright "things" in the Sky of Saturn55 visiteCaption NASA:"Saturn's shadow cloaks the faint D-Ring at the bottom of this image. Observations of the shadow boundary, like this one, enable scientists to clearly detect and measure the brightness of diffuse and faint Ring features like the inner part of the D-Ring. Such brightness measurements are often difficult to make, but the shadow region provides a very dark standard against which to compare the D-Ring, as the only brightness in the shadow is provided by the background of space.
The bright specks across the scene, both in the bright Rings and in the shadow, are either stars or cosmic ray hits on the camera's detector. This view looks toward the unlit side of the rings from about 42° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on Nov. 12, 2006. Cassini was then at a distance of approx. 1,4 MKM (about 900.000 miles) from Saturn and at a phase angle of 152°.
Image scale is roughly 8 Km (5 miles) per pixel".MareKromium
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as17-147-22500.jpgAS 17-147-22500 - North Massif55 visitenessun commentoMareKromium
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as17-147-22511.jpgAS 17-147-22511 - East Massif55 visitenessun commentoMareKromium
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vg2_1131435-00.jpgThe "Dark Eye" of Neptune (natural colors, according to Lunexit)55 visitenessun commento
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The_Rings-PIA08840.jpgThe Main Ring-System55 visiteCaption NASA originale:"This expansive view takes in most of Saturn's main Ring System, from the outer C-Ring to the narrow and knotted-looking F-Ring. The broad brightness plateaus in the C-Ring (at bottom) transform into the more densely populated (and thus darker in this viewing geometry) B-Ring. The Rings' appearance becomes brighter and smoother beyond the bands of the Cassini Division, in the A-Ring. This view looks toward the unlit side of the Rings from about 49° above the Ring-Plane.
The image was taken in visible blue light with the Cassini spacecraft wide-angle camera on Nov. 21, 2006 at a distance of approx. 539,000 Km (about 335.000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 98°.
Image scale is 29 kilometers (18 miles) per pixel".MareKromium
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Mimas-PIA08842.jpgMonochrome Mimas55 visitenessun commento
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The_Rings-PIA08846.jpgLights through the Rings...55 visiteCaption NASA:"With the Sun directly behind Cassini, the spacecraft spies the Opposition Surge in Saturn's inner A-Ring. The opposition effect becomes visible from this special viewing geometry. (...)
This view looks toward the Rings from about 11° below the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on Dec. 2, 2006 at a distance of approx. 287.000 Km (178.000 miles) from Saturn. Image scale is roughly 17 Km (about 11 miles) per pixel".
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The_Rings-PIA08855.jpgMulticolored Rings...55 visiteCaption NASA:"Both luminous and translucent the C-Ring sweeps out of the darkness of Saturn's shadow and obscures the Planet at lower left.
The Ring is characterized by broad, isolated bright areas, or "plateaux", surrounded by fainter material. This view looks toward the unlit side of the Rings from about 19° above the Ring-Plane. North on Saturn is up. The dark, inner B-Ring is seen at lower right.
The image was taken in visible light with the Cassini spacecraft wide-angle camera on Dec. 15, 2006 at a distance of approx. 632.000 Km (about 393.000 miles) from Saturn and at a phase angle of 56°.
Image scale is roughly 34 Km (about 21 miles) per pixel".
Nota: il sistema di elaborazione in "colori naturali" non è cambiato ma, come vedete Voi stessi, i colori di Saturno sono (leggermente) mutati. Come mai? La risposta, a nostro parere, deve essere rinvenuta nel tipo di filtraggio utilizzato dalla NASA per l'ottenimento dell'immagine originale in b/n. Questo vuol dire, fra l'altro, che i frames in b/n NON sono affatto tutti uguali (come molti invece ritengono). E' il tipo di flitro impiegato per l'ottenimento dell'immagine originale - ottenuta sulla scala dei grigi - che poi determinerà, in sede di trasformazione del frame in immagine a colori, il "tipo di colori"!
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Pan-PIA08857.jpgPan55 visiteCaption NASA:"Pan is seen in this color view as it sweeps through the Encke Gap with its attendant ringlets. As the lemon-shaped little moon orbits Saturn, it always keeps its long axis pointed along a line toward the Planet. From this vantage point, the dark side of the moon is visible.
This view looks toward Pan (26 Km or 16 miles across) within the Encke Gap (325 Km or 200 miles wide), on the unlit side of the Rings, and from an inclination of about 33° above the Ring-Plane.
Images taken using red, green and blue spectral filters were combined to create this natural color view. The image was taken with the Cassini spacecraft narrow-angle camera on Dec. 16, 2006 at a distance of approx. 779.000 Km (about 484.000 miles) from Pan and at a Sun-Pan-spacecraft, or phase angle of 83°.
Image scale is roughly 5 Km (a little more than 3 miles) per pixel".MareKromium
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as09-22-3345.jpgAS 09-22-3345 - Land of Beauty...55 visitenessun commento
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as09-22-3343.jpgAS 09-22-3343 - Coast-line and (small) clouds55 visitenessun commento
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