| Piú votate - Saturn: the "Ringed Beauty" and His Moons |
Propellers-000-PIA07792.jpgThe "Propellers" of the Rings (1) - HR57 visiteThis collection of 3 Cassini images provides context for understanding the location and scale of some "propeller-shaped features" observed within Saturn's A-Ring.
Careful analysis of the HR images taken by Cassini's cameras as the spacecraft slipped into Saturn orbit revealed the 4 faint, propeller-shaped double-streaks in an otherwise bland part of the mid A-Ring. Imaging scientists believe the "propellers" provide the first direct observation of the dynamical effects of moonlets which are approx. 100 mt (such as about 300 feet) in diameter.
The propeller moonlets represent a so far unseen size-class of particles orbiting within the Rings.
The 2nd panel provides broad context within the Rings, and shows the B-Ring, the Cassini Division, the A-Ring and the F-Ring. Image scale in the radial, or outward from Saturn, direction is about 45 Km (about 28 miles) per pixel; because the Rings are viewed at an angle, the image scale in the longitudinal - or circumferential - direction is several times greater.
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Rhea&Dione-N00056094.jpgIn-transit: Dione and Rhea (8)58 visitenessun commento
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Rhea&Dione-N00056093.jpgIn-transit: Dione and Rhea (7)56 visitenessun commento
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Rhea&Dione-N00056092.jpgIn-transit: Dione and Rhea (6)57 visitenessun commento
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Rhea&Dione-N00056091.jpgIn-transit: Dione and Rhea (5)55 visitenessun commento
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Rhea&Dione-N00056089.jpgIn-transit: Dione and Rhea (3)57 visitenessun commento
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Rhea-N00055829.jpgCrescent Rhea (1)58 visitenessun commento
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Rhea-N00055725.jpgMoments of Rhea (3)56 visitenessun commento
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The Rings-GRing-N00055772.jpgN00055772: the motion of Cassini56 visiteData:"N00055772.jpg was taken on March 21, 2006 and received on Earth March 22, 2006. The camera was pointing toward Saturn's G-Ring that, at the time, was approximately 749.522 Km away.
The image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Rhea&Saturn-PIA08132.jpgCrescent Rhea57 visiteCaption NASA originale:"Shadow-striped Saturn and its exquisitely thin Rings occupy the near-field view in this Cassini image, while a crescent moon Rhea hangs in the distance.
A couple of bright pixels at the center of the image mark the location of the tiny moon Pan (only 26 Km, or 16 miles across).
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 3, 2006, at a distance of approx. 4,1 MKM (2,5 MMs) from Saturn and 4,6 MKM (2,9 MMs) from Rhea. The image scale is 28 Km (approx. 17 miles) per pixel on Rhea".
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Enceladus&Rhea-PIA08133.jpgEnceladus and Rhea, divided by the Rings58 visiteCaption originale:"Rhea and Enceladus hover in the distance beyond Saturn's Ring-Plane. Enceladus (left, 505 Km - about 314 miles - wide), bathed in icy particles from Saturn's E-Ring, appears noticeably brighter than Rhea (right, 1528 Km - about 949 miles - wide).
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 8, 2006, at a distance of approx. 4,3 MKM (such as about 2,7 MMs) from Enceladus and 4,6 MKM (about 2,9 MMs) from Rhea.
The image scale is approx. 26 Km (roughly 16 miles) per pixel on Enceladus and about 28 Km (roughly 17 miles) per pixel on Rhea.
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Enceladus-PIA08128.jpgIn-transit over Saturn's Terminator...56 visiteEnceladus hangs like a single bright pearl against the golden-brown canvas of Saturn and its icy Rings. Visible on Saturn is the Region where daylight gives way to dusk (--> crepuscolo). Above, the Rings throw thin shadows onto the Planet.
Images taken using red, green and blue spectral filters were combined to create this natural color view.
The images were taken using the Cassini spacecraft wide-angle camera on Jan. 17, 2006 at a distance of approx. 200.000 Km (about 100.000 miles) from Enceladus.
The image scale is approx. 10 Km (about 6 miles) per pixel.
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