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IO - TRUE COLOR FROM GALILEO.jpgIo in true colors93 visiteNASA's Galileo spacecraft acquired its highest resolution images of Jupiter's moon Io on 3 July 1999 during its closest pass to Io since orbit insertion in late 1995. This color mosaic uses the near-infrared, green and violet filters (slightly more than the visible range) of the spacecraft's camera and approximates what the human eye would see. Most of Io's surface has pastel colors, punctuated by black, brown, green, orange, and red units near the active volcanic centers. A false color version of the mosaic has been created to enhance the contrast of the color variations.
The improved resolution reveals small-scale color units which had not been recognized previously and which suggest that the lavas and sulfurous deposits are composed of complex mixtures (Cutout A of false color image). Some of the bright (whitish), high-latitude (near the top and bottom) deposits have an ethereal quality like a transparent covering of frost (Cutout B of false color image). Bright red areas were seen previously only as diffuse deposits. However, they are now seen to exist as both diffuse deposits and sharp linear features like fissures (Cutout C of false color image). Some volcanic centers have bright and colorful flows, perhaps due to flows of sulfur rather than silicate lava (Cutout D of false color image). In this region bright, white material can also be seen to emanate from linear rifts and cliffs.
Comparison of this image to previous Galileo images reveals many changes due to the ongoing volcanic activity.
Galileo will make two close passes of Io beginning in October of this year. Most of the high-resolution targets for these flybys are seen on the hemisphere shown here.
North is to the top of the picture and the sun illuminates the surface from almost directly behind the spacecraft. This illumination geometry is good for imaging color variations, but poor for imaging topographic shading. However, some topographic shading can be seen here due to the combination of relatively high resolution (1.3 kilometers or 0.8 miles per picture element) and the rugged topography over parts of Io. The image is centered at 0.3 degrees north latitude and 137.5 degrees west longitude. The resolution is 1.3 kilometers (0.8 miles) per picture element. The images were taken on 3 July 1999 at a range of about 130,000 kilometers (81,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft during its twenty-first orbit.
(11 voti)
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NGC-6369.jpgNGC 6369 - HST (?)111 visite"...Ex parvis, saepe, magnarum momenta rerum pendent..."
(Livio)
"...Da piccole cose, sovente, possono nascere grandi eventi..."
(11 voti)
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M-020-4.jpgM 20 - The "Trifid Nebula" - detail mgnf -104 visite"...Numquam aliud natura, aliud sapientia dicit..."
(Giovenale)
"...Non accade mai che la Natura e la Saggezza siano, nel loro essere, discordi..."
(11 voti)
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M-020-5.jpgM 20 - The "Trifid Nebula"88 visite"...Omnia mea mecum porto..."
(Cicerone)
"...Tutti i miei beni (tutto ciò che ha reale valore) sono (è) con (in) me..."
(11 voti)
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SOL082-HEAD-2P133646803EFF2232P2361R1M1.jpgBoulders field (2)417 visiteEbbene anche le tracce che il Rover Spirit si lascia alle spalle sono scure e profonde. E' come se...Come se tutta l'area di Gusaev Crater NON fosse affatto gelata ma, piuttosto... FANGOSA. Uno strato secco e sabbioso in superficie che copre un terreno morbido e fangoso, assolutamente non gelato, che può essere intaccato (avvallato, bucato e scavato) con facilità estrema. Ora, se questo è - come sembra, dati alla mano - vero, noi pensiamo che la stima della temperatura "al suolo" fatta dagli Scienziati, utilizzando le loro ultra-tecnologiche ed ultra-costose attrezzature (inclusi i rilievi effettuati con lo spettrometro ad infrarossi di cui è dotata la Sonda Mars Global Surveyor la quale è, da parecchio tempo, in orbita attorno a Marte e sta cercando di carpirne alcuni dei suoi "segreti"...) sia decisamente errata.
(11 voti)
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SOL056-2N131344812EFF1151P1940R0M1.jpgWhere's the Rat? Where's the "hole"? (2)581 visiteNoi, come già detto durante l'analisi dei frames "Moon - Apollo 11", non crediamo che alla NASA siano così sciocchi da fare cose del genere mentre il Mondo intero guarda e si pone domande, però...Occorre ammettere che il masso (chiamiamolo) "minore" presenta, alla luce di queste nuove immagini, delle caratteristiche superficiali COMPLETAMENTE DIVERSE da quelle che potevano riscontrarsi solo un Sol prima...
(11 voti)
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SOL3694-mars_nasa_gov_msl-raw-images_proj_msl_redops_ods_surface_sol_03694_opgs_edr_ncam_NRB_725407718EDR_F0990188NCAM00560M_.JPGSol 3694 - What a Top!96 visitenessun commentoMareKromium
(10 voti)
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Mars_and_Donald_Duck.jpgDonald Duck in the Martian Sky!!!129 visiteWow!!! I read so much b.s. on the www in the past 20 years that I thought it could have been enough... But now I can see that the level of wws (world-wide.stupidity) has become way too high...even for me!MareKromium
(10 voti)
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W-Martian_Clouds-00.gifClouds...102 visiteJust beautiful, what else to say?MareKromium
(10 voti)
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W-Martian_Clouds-01.gifClouds...77 visiteJust beautiful, what else to say?MareKromium
(10 voti)
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SOL0621-ZL7_0621_0722074727_054EBY_N0301172ZCAM01521_1100LMJ01_1200.jpgPhobos eclipses the Sun! - Sol 621132 visiteCaption NASA Originale:"This photo was selected by public vote and featured as "Image of the Week" for Week 92 (Nov. 13 - 19, 2022) of the Perseverance Rover Mission on Mars. NASA's Mars Perseverance Rover acquired this image using its Left Mastcam-Z camera. Mastcam-Z is a pair of cameras located high on the Rover's Mast. This image was acquired on Nov. 18, 2022 (Sol 621) at the Local Mean Solar Time of 13:56:29".MareKromium
(10 voti)
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Max-010.jpgDreams never die...205 visitenessun commentoMareKromium
(10 voti)
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