Saturn: the "Ringed Beauty" and His Moons |
 |
| TITOLO |
+ |
- |
| NOME FILE |
+ |
- |
| DATA |
+ |
- |
| POSIZIONE |
+ |
- |
|
|
Saturn (natural colors; credits: NASA)14 visteCaption NASA:"The Cassini Spacecraft looks toward the sunlit face of Saturn's Rings, whose shadows continue to slide southward on the Planet toward their temporary disappearance during equinox in August 2009.
This two-frame color mosaic was created from images taken as part of a photometry observation of the Rings. Photometry observations are useful for determining a host of ring particle properties.
This view looks toward the sunlit side of the Rings from about 3° below the Ring-Plane. Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini Spacecraft wide-angle camera on Aug. 22, 2008 at a distance of approx. 1,2 MKM (such as about 728.000 miles) from Saturn.
Image scale is roughly 66 Km (about 41 miles) per pixel".
|
|
Sliding Away... (natural colors; credits: NASA)13 visteCaption NASA:"The Cassini Spacecraft looks toward Rhea's cratered, icy landscape with the dark line of Saturn's Ring-Plane and the Planet's murky atmosphere as a background.
Rhea is Saturn's second-largest moon, at about 1528 Km (approx. 949 miles) across.
This view looks toward the unilluminated side of the Rings from less than 1° above the Ring-Plane.
Images taken using red, green and blue spectral filters were combined to create this natural color view. The images were acquired with the Cassini spacecraft narrow-angle camera on July 17, 2007 at a distance of approx. 1,2 MKM (such as about 770.000 miles) from Rhea.
Image scale is roughly 7 Km (about 4,5 miles) per pixel"
|
|
Space Encounter: Mimas and Prometheus (3)13 visteCaption NASA:"N00121933.jpg was taken on October 20, 2008 and received on Earth October 21, 2008.
The camera was pointing toward MIMAS that, at the time, was approx. 1.056.495 Km away.
This image was taken using the CL1 and CL2 filters and it has not been validated or calibrated."
|
|
Space Encounter: Mimas and Prometheus (2)13 visteCaption NASA:"N00121933.jpg was taken on October 20, 2008 and received on Earth October 21, 2008.
The camera was pointing toward MIMAS that, at the time, was approx. 1.054.003 Km away.
This image was taken using the CL1 and CL2 filters and it has not been validated or calibrated."
|
|
Space Encounter: Mimas and Prometheus (1)13 visteCaption NASA:"N00121933.jpg was taken on October 20, 2008 and received on Earth October 21, 2008.
The camera was pointing toward MIMAS that, at the time, was approx. 1.052.776 Km away.
This image was taken using the CL1 and CL2 filters and it has not been validated or calibrated."
|
|
The Bright Canyons of Dione14 visteCaption NASA:"Dione's defining feature, the fractures on its Trailing Side, shine brilliantly in this Cassini Spacecraft view.
The view was acquired from a position 33° South of the moon's Equator. Lit terrain seen here is on the Trailing Side of Dione (approx. 1123 Km, or about 698 miles across). North is up and rotated 8° to the right.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 11, 2008. The view was obtained at a distance of approximately 833,000 kilometers (517,000 miles) from Dione and at a Phase Angle of 67°. Image scale is about 5 Km (a little more than 3 miles) per pixel.
The image was taken with the Cassini Spacecraft wide-angle camera on Aug. 26, 2008 using a spectral filter sensitive to wavelengths of infrared light centered at 752 nanometers.
The view was acquired at a distance of approx. 397.000 Km (about 246.000 miles) from Saturn.
Image scale is roughly 20 Km (about 13 miles) per pixel".
|
|
Icy Plume in the Saturnshine! (natural colors; credits: Lunexit)44 visteCaption NASA:"The active Surface Jets on Enceladus collectively form a brilliant, extended Plume that is made visible as sunlight scatters among the microscopic particles of ice.
The Plume is more easily seen with the Sun directly, or almost directly, behind Enceladus, as is the case here. The moon's surface is lit here by reflected light from Saturn.
The image was taken in visible light with the Cassini Spacecraft narrow-angle camera on Sept. 17, 2008. The view was obtained at a distance of approx. 235.000 Km (such as about 146.000 miles) from Enceladus and at a Sun-Enceladus-Spacecraft angle of 140°.
Image scale is approx. 1 Km (0,6 mile) per pixel".
|
|
Beneath the South Pole of Saturn14 visteCaption NASA:"What clouds lurk beneath Saturn's unusual South Pole?
To help find out, the robotic Cassini Spacecraft currently orbiting Saturn imaged the nether region of the gigantic ringed orb in infrared light.
There thick clouds appear dark as they mask much of the Infrared Light emitted from warmer regions below, while relatively thin clouds appear much lighter. Bands of clouds circle Saturn at several latitudes, while dark ovals indicate many dark swirling storm systems. Surprisingly, a haze of upper level clouds visible towards Saturn's Equator disappears near the Pole, including over Saturn's strange Polar Vortex.
Cassini entered orbit around Saturn in 2004, and recorded the above image last year (2007)".
|
|
Cross-Worlds: the Answer!13 visteRicordate la sequenza (intitolata, appunto, Cross-Worlds) che pubblicammo qualche settimana fa (era il 14 Settembre 2008, per l'esattezza) e che ci mostrava (ovviamente nell'ottica di CASSINI) Dione mentre eclissava un'altra Luna non identificata?
Noi ipotizzammo che si potesse trattare di Mimas o di Encelado. La NASA, oggi, tramite il suo Planetary Photojournal, ci ha risposto: si trattava di Encelado.
Un grazie alla NASA (che, quando vuole, sa anche rispondere) ed un 6+ a noi perchè, anche se non siamo riusciti ad identificare con sicurezza assoluta la seconda luna "misteriosa" in transito, siamo stati comunque abbastanza bravi dal ridurre la rosa dei "candidati" a due soli Corpi Celesti.
Insomma...Non male!
|
|
Enceladus Oct. 9, 2008 Flyby28 visteCaption NASA:"The image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 9, 2008, from a distance of approx. 47.000 Km (about 29.000 miles) from Enceladus.
Image scale is 279 meters (916 feet) per pixel".
|
|
Enceladus Oct. 9, 2008 Flyby34 visteCaption NASA:"The image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 9, 2008, a distance of approx. 42.000 Km (about 26.000 miles) from Enceladus.
Image scale is 503 meters (1650 feet) per pixel".
|
|
Enceladus Oct. 9, 2008 Flyby44 visteCaption NASA:"This image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 9, 2008, from a distance of approx. 26.000 Km (16,000 miles) from Enceladus. Image scale is 312 meters (1024 feet) per pixel".
|
|
| 2530 files su 211 pagina(e) |
|
|
|
|
|
|
|
174 | |
|
|
|
|
|
