| Piú viste - Saturn: the "Ringed Beauty" and His Moons |
The Rings from 19.436.000 Km.jpgThe Rings from app.x 19.436.000 Km56 visitenessun commento
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The Rings (Cassini division) after Orbital Ins..jpgThe "Cassini Division" after successful orbital insertion56 visitenessun commento
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The Rings from 6.278.000 Km.jpgThe Rings from app.x 6.278.000 Km56 visitenessun commento
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JAPETUS from 3.000.000 Km.jpgJapetus from Cassini-Huygens - approx. 3.000.000 Km away56 visiteIapetus Data and Statistics
Discovered by = Giovanni Domenico Cassini
Date of discovery = 1671
Mass (kg) = 1.88e+21
Mass (Earth = 1) = 3.1459e-04
Equatorial radius = 730 Km
Equatorial radius (Earth = 1) = 1.1446e-01
Mean density (gm/cm^3) = 1.21
Mean distance from Saturn = 3.561.300 Km
Rotational period (days) = 79.33018
Orbital period (days) = 79,33018
Mean orbital velocity (km/sec) = 3,27
Orbital inclination (degrees) = 14,72°
Escape velocity (km/sec) = 0,586
Visual geometric albedo = 0,2
Magnitude (Vo) = 10,2-11,9
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Prometheus & Pandora from Cassini-Huygens.jpgPrometeus & Pandora from Cassini-Huygens56 visitevedi il commento al frame che precede
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Saturn from approx. 9.000.000 Km.jpgWhat is this?!? (2)56 visiteUn'immagine curiosa, misteriosa ed affascinante: gli strumenti di bordo della Sonda Cassini-Huygens dicono che questa ripresa si riferisce all'Anello "E"; in pratica diremmo che la fotocamera in questione stava riprendendo (come è già accaduto tante volte) lo Spazio di Saturno. Il chiarore rotondeggiante che vediamo in basso non sembra l'alone di luce che l'Anello "E" emana intorno a sè. E allora di che cosa si tratta?
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Saturn-HST-Oct1999-PIA03161_modest.jpgSaturn from Hubble Space Telescope (Oct. 1999)56 visitenessun commento
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Saturn_s Clouds-V2-PIA01958_modest.jpgSaturn's Clouds from Voyager 256 visiteCaption NASA originale:"In this Voyager 2 observation of Saturn’s northern mid-latitudes is seen a strangely curled cloud attached by a thin ribbon to the bright white cloud region to the north. The cloud has been monitored for seven rotations around the planet. It appears to be forming a closed loop. Other discrete clouds are seen to the east. Also evident is the “ribbonlike” structure at 47 north latitude in the white cloud region. The spacecraft took this image from a distance of about 9.300.000 Km".
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Saturn_s Clouds-HST-PIA01464_modest.jpgSaturn's Clouds from Hubble Space Telescope56 visiteCaption NASA originale:"This NASA Hubble Space Telescope image of the ringed planet Saturn shows a rare storm that appears as a white arrowhead-shaped feature near the planet's equator. The storm is generated by an upwelling of warmer air, similar to a terrestrial thunderhead. The east-west extent of this storm is equal to the diameter of the Earth (about 7,900 miles). Hubble provides new details about the effects of Saturn's prevailing winds on the storm. The new image shows that the storm's motion and size have changed little since its discovery in September, 1994".
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Japetus from 2.900.000 Km - PIA06466_modest.jpgTwo-faced Japetus56 visiteCaption NASA originale:"The dark material that coats one hemisphere of Saturn's moon Iapetus is very dark, as these two processed views of the same frame can demonstrate.
The image on the left has been cleaned of cosmic rays and magnified; in this otherwise un-enhanced view, only a small part of the moon's surface, at the bottom, is visible because it is part of the bright side of Iapetus. (Only the right hand side of Iapetus is illuminated by sunlight.) The same image, shown on the right, has been contrast-enhanced to make visible the part of the illuminated side of Iapetus that is coated with dark material".
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Saturn-N00016277.jpgSaturn, Moons and Stars56 visitenessun commento
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Saturn-N00016134.jpgSaturn: clouds and rings from about 8.866.000 Km56 visitenessun commento
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