| Piú viste - Saturn: the "Ringed Beauty" and His Moons |
Dione-N00086961.jpgSpace Encounter: Dione and Prometheus (4)95 visitenessun commentoMareKromium
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Helene-N00152207-N00152228.gifHelene and much more... (GIF-Movie; credits: Dr Gianluigi Barca - Lunexit Team)95 visitenessun commentoMareKromium
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Enceladus_and_Titan-PIA14617-PCF-LXTT-IPF.jpgSo close, and yet so far... (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia/Italian Planetary Foundation)95 visiteThe Saturnian moon Enceladus can be seen partially (as a matter of fact, we have to say almost completely) eclipsed by the shadow of its Gas-Giant Parent Planet, in this really fascinating view, taken by the the NASA - Cassini Spacecraft, which also features another Saturnian moon, such as Titan, in the distance. The Cassini Spacecraft flew by Enceladus, shown in the upper left of the picture, at a distance of about 16.000 miles (such as approx. 26.000 Km).
The Terminator - such as the Line separating the day from the night side - of Enceladus (whose dimension is approx. 313 miles, or about 504 Km across) can be barely seen on the very far left of the moon itself, while the shadow of Saturn runs all the way across from its Middle Northern, until the South Polar Regions. Titan (whose dimension is approx. 3200 miles, or about 5150 Km across), as we already mentioned hereabove, is well visible in the lower right of the frame, and, at the time that the picture was taken, it was about 684.000 miles (such as approx. 1,1 Million KiloMeters - MKM) away from the Spacecraft.
This view looks toward the Saturn-facing Sides of both Enceladus and Titan; North is up (obviously for both moons) and the image was taken in Visible Light, with the Cassini Spacecraft Wide-Angle Camera on October, 1st, 2011. The view was obtained at a Sun-Enceladus-CASSINI Spacecraft, or Phase, Angle of 29°. The Scale in the original image was approx. 2 miles (such as a little more than 3 Km) per pixel on Enceladus. The original image was also contrast enhanced and magnified by a factor of 1.5, so to enhance the visibility of a few Enceladian Surface Features (and in fact, if you look carefully, while Titan is - as usual, when observed from a great distance - completely featureless, a few Impact Craters and some Surface Striations, can actually be seen in the Northern Regions of the icy moon Enceladus).
This picture (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 14617) has been additionally processed and then colorized, according to an informed speculation carried out by Dr Paolo C. Fienga (LXTT-IPF), in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Cassini Spacecraft and then looked outside, towards the Saturnian moons Enceladus and Titan), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present on the Surface of Enceladus and in the Atmosphere of Titan, respectively, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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Dione-N00047220.jpgDione94 visiteOriginal caption:"N00047220.jpg was taken on December 24, 2005 and received on Earth December 24, 2005. The camera was pointing toward DIONE that, at the time, was approximately 435.332 Km away.
The image was taken using the CL1 and CL2 filters".
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Saturn-W00017984.jpgWhat do some images show? (2)94 visitenessun commento
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Dione-N00119786.jpgCross-Worlds! (2)94 visitenessun commentoMareKromium
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Prometheus-PIA12787.jpgGravitational Waves94 visitenessun commentoMareKromium
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Janus-PIA06603.jpgJanus and Atlas93 visiteCaption NASA originale:"The irregularly-shaped moon Janus (181 Km across) and the small ring moon Atlas (32 Km across) had just emerged from the darkness of Saturn's shadow when Cassini caught this view of the two moons.
Saturn's bright A-Ring is largely overexposed in this view, but several other ring details are nicely visible. The image shows two bright regions within the B-Ring (at right), ringlets of material within the dark, narrow Encke Gap and kinks in the F-Ring.
North on Saturn is tilted toward upper left. This view is from Cassini's vantage point beneath the ring plane. It is notable that, as Saturn orbits the Sun, its shadow has been steadily creeping farther out along the ring plane and now extends beyond the F-Ring. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 26, 2005, at a distance of approximately 3,2 MKM from Janus and at a phase angle of 81°. The image scale is 19Km/pixel".
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Streak-N00065622-1.jpgWhat is that? (context image)93 visiteDi che cosa è espressione questa ennesima "striscia" nello Spazio di Saturno?
La NASA, come sempre, non aggiunge nulla a quello che mostra l'immagine - a parte le consuete (e spesso totalmente inutili) informazioni di contorno al frame e cioè:"N00065622.jpg was taken on September 09, 2006 and received on Earth September 09, 2006. The camera was pointing toward SKY, and the image was taken using the CL1 and CL2 filters".
Allora: escludiamo subito - dopo aver fattoqualche detail mgnf del frame - l'ipotesi per cui si tratti di un image-artifact.
Che cosa resta? Vediamo: forse un raggio cosmico?
No: perchè, come vedrete meglio nei detail mgnfs che seguono, c'è un "cambio di rotta" - leggero ma evidente - nel movimento del corpo che ha lasciato la traccia.
(un comportamento assolutamente estraneo - a quanto ci è dato sapere - ai raggi cosmici - che, di regola, "non cambiano rotta". Mai)
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Enceladus-FullColor-MF-PCF2.jpgEnceladus (an Image-Mosaic in Natural Colors; credits for the additional process. and color.: Drr Marco Faccin and Paolo C. Fienga - Lunexit Team)93 visitenessun commentoMareKromium
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Saturn-PIA12721-PCF-LXTT.jpgThe "Oily Clouds" of Saturn (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)93 visiteCaption NASA:"Clouds in Saturn's Upper Atmosphere create an intricate pattern reminiscent of whipped cream swirling in coffee. The view is centered on a region located about 15° South of the Planet's Equator. The image was taken with the Cassini Spacecraft narrow-angle camera on July 18, 2010 using a spectral filter sensitive to wavelengths of Near-InfraRed light centered at 727 nanometers.
The view was obtained at a distance of approx. 2,4 MKM (abput 1,5 MMs) from Saturn and at a Sun-Saturn-Spacecraft angle of 107°.
Image scale is roughly 14 Km (a little less than 9 miles) per pixel".MareKromium
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Dione-PIA08256-E.jpgThe "White (and Bright) Cliffs" of Dione (detail mgnf n. 5)92 visitenessun commento
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