Risultati della ricerca nelle immagini - "Phobos?" |
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000-Phobos-Global_Map-ESA.jpgPhobos: Global Map (False Colors)55 visiteCaption ESA:"This mosaic image is composed by 53 pictures obtained by the Super Resolution Channel (or SRC, a part of the High Resolution Stereo Camera experiment) on board ESA’s Mars Express.
The SRC images covered 70% of the moon's surface. The remaining area is filled with 16 images previously obtained by NASA’s Viking mission.
The mean resolution is 12 mt/pixel". MareKromium
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P-Phobos-M09_mtvs4109_09.jpgPhobos, from Mariner 9 (HR)82 visiteDi immagini controverse di Phobos (e non necessariamente connesse all'incidente della Sonda Phobos-2) ce ne sono tante - anche nella nostra Sez. "Mars and His Moons" - ma un'immagine spettacolare, nitida e così profondamente diversa dalle altre (tutte le altre, specie le più recenti!) non è comune sulla Rete.
Guardate il Phobos ripreso da Mars Express (liscio e piatto) o quello di Mars Global Surveyor (un pò più accidentato, ma sempre liscio e piatto per un ampia percentuale della sua superficie) e poi osservate questo splendido frame Mariner 9: Vi sembra che state guardando lo stesso oggetto?
Certo, la forma "a patata", nelle sue linee essenziali, è rimasta ma...la superficie della misteriosa Luna Marziana che vediamo in questo frame ormai "preistorico" è radicalmente differente da quella che vediamo nei frames "moderni".
E allora? E allora la domanda è: Phobos è cambiato in 30 anni oppure le Grandi Agenzie Spaziali ci stanno - ahinoi, costantemente - prendendo in giro?
Guardate, e poi decidete Voi stessi (anche se, purtroppo, c'è davvero poco da decidere)...
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PHOBOS-Image001-409-20081008-5870-6-nd3-02-PhobosSeries_H1.jpgPhobos, from Mars Express53 visiteThis image was obtained by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express on 28 July 2008 (orbit 5870), at a distance of 351 Km from the moon’s centre. The image was taken using the camera’s nadir channel, at a resolution of 14 mt/pixel.
The origin of Phobos is debated. While its density, lower than the density of the Martian Surface rocks, make it appear to belong to "D-Class" Asteroids, the moon appears to share many surface characteristics with the class of carbonaceous "C-Type" asteroids, which suggests it might have been captured from this population.
However, it is difficult to explain either the capture mechanism or the following evolution of its orbit into the Equatorial Plane of Mars.
An alternative hypothesis is that it formed in its present position, and is therefore a remnant from the planetary formation period.MareKromium
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PHOBOS-Image002-415-20081008-5861-6-src-01-PhobosSeries_H1.jpgPhobos: close-up, from Mars Express55 visiteThis striking close-up image of Phobos was obtained by the Super Resolution Channel (or SRC, a part of the High Resolution Stereo Camera experiment) on board ESA’s Mars Express on 26 July 2008 (orbit 5861). The distance from the moon’s centre was 2295 Km, and the image resolution is 20 mt/pixel.
The Super Resolution Channel (SRC), is an additional camera sharing HRSC’s processing electronics. Unlike HRSC, SRC is a framing camera, taking a complete image during a single exposure like a conventional pocket camera. Its 975 mm Maksutov-Cassegrain telescope gives it a pixel-resolution about four times higher than that of HRSC.
Early in the mission, the thermal conditions of the instrument in space caused a distortion in its precision optics. This resulted in a performance lower than expected, with some blur and ghosting visible in the raw images.
However, a significant part of the degradation has now been compensated for by analysing the effect of the distortion on test images (with point-like stars as target) and applying a corrective processing.MareKromium
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PHOBOS-Image013-411-20081008-5870-6-s12_nd-01-PhobosSeries_H1.jpgViews of Phobos53 visiteThis sequence of images was obtained by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express on 26 July 2008 (orbit 5861), at a distance of about 2295 Km from the moon’s centre, and provides a striking impression of the encounter.
These imagee was taken using all 9 imaging channels of the camera. The resolution shown here is 92 mt/pixel for each image.
HRSC is a so-called push-broom camera, building up images in a ‘scanning’ mode while the spacecraft passes over the surface. Its nine channels, or scanning lines, are oriented in different directions that spread from 18,9° behind the nadir viewpoint (corresponding to a vertical line of sight), to 18,9° ahead of the nadir. This gives the camera its stereo-viewing capacity.MareKromium
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PHOBOS-Image014-412-20081008-5861-6-all_row-PhobosSeries_H1.jpgPhobos' Sequence54 visitenessun commentoMareKromium
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PHOBOS-Image015-20131016_mariner9_phobos_(1).pngIs this Phobos?85 visiteUna sequenza di immagini della "Luna Condannata", Phobos, ottenute dalla Sonda NASA Mariner 9. Bizzarro. Guardate le foto di Phobos ottenute da Sonde "recenti" (MGS su tutte). A me sembra che, fra l'oggetto ripresi dalla Mariner 9 e quello ripreso dalla MGS (come da Mars Express ed altre), vi sia solo una "vaga" somiglianza. Dunque: il "trucco" è nell'angolo di ripresa o dove? Abbiamo immagini genuine ed immagini farlocche?!?... Ditemi Voi.MareKromium
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PHOBOS-Image016-Mariner_9_Phobos_001.jpgPhobos, from Mariner 986 visiteIs this really Phobos?!?MareKromium
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PHOBOS-Image017-Mariner_9_Phobos_002.jpgPhobos, from Mariner 989 visitenessun commentoMareKromium
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PHOBOS-Image018-Mariner_9_Phobos_feature.jpgPhobos, from Mariner 987 visitenessun commentoMareKromium
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