| Risultati della ricerca nelle immagini - "debris" |
019-Vesta-5-PIA13427.jpg4-Vesta from Hubble Space Telescope102 visiteThe Asteroid 4-Vesta is somewhat like our Moon, with ancient Lava Beds (the dark patches) and powdery Debris (or Regolith), such as the pulverized remains of impacts (the orange-colored areas). A flattened area on one end of 4-Vesta is a giant Impact Crater formed by a collision that perhaps occurred billions of years ago.
The crater is approx. 460 Km (285,66 miles) across, which makes it close to 4-Vesta's roughly 530-Km (329,13-mile) diameter. The asteroid is about the size of Arizona.
4-Vesta is one of the largest of a reservoir of about 100.000 Asteroids, the leftover material from the formation of our Solar System.
Astronomers combined images of Vesta in Near-UltraViolet and blue light to make this picture movie. The Hubble observations were made on Feb. 25 and Feb. 28, 2010.MareKromium
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083-Craters-Caparronia_Crater-PIA15129-PCF-LXTT.jpgCaparronia Crater and Surroundings (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)226 visiteThis Dawn FC (framing camera) image is dominated by Caparronia Impact Crater. Caparronia Crater is approximately 55 Km in diameter and has a mostly fresh, irregularly shaped Rim. It also has a curved, linear mound running across most of its base. For all of these reasons Caparronia is a distinctive Crater and this is why it was chosen to name the Quadrangle in which it is situated. The smooth region around Caparronia Crater is most likely fine Impact Ejecta, which were thrown out from the Crater at the time of its formation. Other impact related features are the linear chains of small, less than 1 km wide, Secondary Craters that occur throughout the image. Some particularly distinctive Crater Chains are in the bottom part of the frame.
Secondary Crater Chains are formed when relatively large debris are ejected from an impact and skip along the Surface, much like a stone skipping across a lake. There are also some linear scars running diagonally across the image, which are due to debris scouring across the Surface.
This image is centered in Vesta's Caparronia Quadrangle and the center Latitude and Longitude of the image is 52,5° North and 149.2° East. NASA's Dawn Spacecraft obtained this image with its framing camera on October 23rd 2011. This image was taken through the camera's clear filter. The distance to the Surface of Vesta, at the time the picture was taken, was approx. 700 km and the image has a resolution of about 70 meters per pixel. This image was acquired during the HAMO (High Altitude Mapping Orbit) phase of the mission.MareKromium
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APOLLO 10 AS 10-28-3990 B-ANOMALY.jpgAS 10-28-3990 - Something's flying in front of the Apollo 10 (detail mgnf from NASA Original)462 visiteUno splendido detail mgnf operato dal nostro Amico e Socio, Fabio Italiano (SpazioUFO.com), che ci aiuta a capire qualcosa di più di questo "rottame spaziale" (o "space debris") che, rotolando nel vuoto, sfreccia a poche decine di metri dalla Navicella Spaziale Americana. I dettagli che emergono dall'altissima definizione del frame ci parlano di una struttura che pare avere origini "traumatiche": essa, infatti, pare proprio essere un frammento di qualcosa di più grande e di metallico (internamente), rivestito da un materiale forse anch'esso metallico, ma avente una tessitura più grossolana (la quale lo rende simile ad una sorta di pietra). Non si tratta, a nostro parere, di un asteroide e non è neppure una "probe" aliena. I bordi, sottili e luccicanti dell'oggetto, ci fanno pensare, piuttosto - e ci rendiamo conto di quanto fantascientifica possa sembrare questa ipotesi - ad un frammento di un'altra nave spaziale andata in pezzi.
Ciò che resta di una tubazione (o di una struttura interna di un qualche tipo), si intravede piuttosto bene sul margine superiore dell'oggetto, così come delle (sempre secondo noi) evidenti tracce di "trauma" (da impatto o da esplosione?) si possono dedurre dalle sfilacciature di lamiera (color argento brillante) che ben si vedono su tutto il lato Sx dell'oggetto - Dx di chi guarda.
Non siamo in condizione di effettuare una stima precisa delle dimensioni dell'oggetto ma, dopo aver visionato un filmato originale NASA in cui si vede qualcosa di molto simile a questo corpo passare rapidamente accanto all'Apollo 10, riteniamo che possa trattarsi di un oggetto piuttosto piccolo (pensate ad una scrivania di modeste dimensioni).
Inutile dire che, in ogni caso, un eventuale impatto di questa "scrivania" con l'Apollo 10, avrebbe avuto conseguenze catastrofiche.
Conclusioni: che cosa è "andato in pezzi", a poca distanza dall'Apollo 10? Chi c'era con loro?...
Un'altra Navicella Americana (magari senza equipaggio) che è stata colpita da qualcosa? Una "sonda" lanciata - malamente - nello spazio circum-lunare dallo stesso Apollo 10? O magari un'astronave Sovietica che, all'insaputa del Mondo, era arrivata per prima nello spazio circum-lunare e poi - come purtroppo è accaduto altre volte - ha malfunzionato ed è infine esplosa? L'Apollo 10 era una Missione di Prova Generale di allunaggio, o una Missione di "Soccorso Spaziale"?
E la NASA, che cosa sa di questo frame?...
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APOLLO 15 AS 15 86-11618.jpgAS 15-86-11618 - The Lunar Rover and the North Complex231 visiteCaption NASA originale:"At the site of their second sample site above the Station 6 crater, Dave took this "locator" to the Rover, with the North Complex in the background. The small, fresh crater with fragmental debris on its rim - probably soil compacted in the impact and, therefore, called regolith breccia or instant rock - is also visible in AS-86-11617".
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APOLLO 15 AS 15-0274.jpgAS 15-0274 - Euler Crater53 visiteIn this oblique view of Euler, some details are shown that are not visible in other pictures. Note, for example, the ledges (L) of bedrock cropping out along the South Wall and the low terraces (T) at the points of contact between the slump masses and the floor. They may be aprons of debris or "bathtub rings" of lava. This oblique viewing angle also enhances the polygonal outline of Euler's rim crest and the size and ruggedness of the huge masses that have slumped from the walls.
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APOLLO 15 AS 15-9287.jpgAS 15-9287 - A "Middle-aged" Crater53 visiteRemarkable detail is shown in this enlargement of a small part of a panoramic camera frame. In most respects, the crater itself is typical of a great many craters its size-about 1,2 Km. Because it does not have rays, it is believed to be older than most other Lunar craters. Its rounded rim crest and slightly raised rim (extending outward to the arrow, on the West side) also point to its greater age. On the other hand, it is young enough that some of the original dunelike texture of the ejecta blanket is preserved (especially to the West), a great many large blocks of ejecta are still visible, and the original depth of the crater has not been greatly lessened by infalling debris. The largest blocks, which are about 30 mt in size, occur near the rim. The terrace (T) extending partly around the wall about 100 mt below the surface probably marks the top of a resistant rock layer. However, if there were other signs of bedrock stratification within this crater, they have been obscured by the movement of debris down the walls. The very smooth floor is the only unusual feature of this crater. It may consist of a solidified pool of rock melted by heat generated from the impact.
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APOLLO 15 AS 15-9328.jpgAS 15-9328 - Bessel Crater54 visiteOutcrops of layered rock are strikingly evident in the upper part of the far wall of the crater Bessel (17- Km diameter) in South-Central Mare Serenitatis. The outcrop is most evident where it forms shadows; however, the dark debris that streams downslope from the layered rock is visible even on parts of the crater wall where the Sun has washed out all details of relief. The outcrop is at a uniform distance below the crater rim, indicating that the strata are horizontal. Thus, Bessel furnishes convincing evidence that mare surfaces are underlain by dark layered rock. The dark rock is now known to be basalt that accumulated as successive flows or layers of lava.
Bessel is youthful enough that boulders are abundant on its rim and floor.
An anomalously high number of boulders is visible in and around the 750-m diameter crater (arrow) on the floor.
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APOLLO 15 AS 15-9591.jpgAS 15-9591 - Tsiolkovsky53 visiteModerate enlargement of part of a panoramic camera frame provides greater detail of the central peak complex of Tsiolkovsky. A relatively large population of superposed craters has been preserved on level areas of the peaks (near the left-center of the photograph). In contrast, very few craters are present on steep slopes-most have been destroyed by the downslope movement of erosional debris. An intermediate population of craters on the dark mare shows that the mare surface is younger than the level areas of the peak complex but older than the freshly exposed steep slopes of the peaks. The youngest part of the mare surface is the dark, smooth area adjacent to the small angular rifle in the upper left corner. Here small craters have been almost completely filled by the flow and are barely discernible. The rifle may have served as the vent for the young lavas.
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APOLLO 15 AS 15-9596.jpgAS 15-9596 - Tsiolkovsky53 visiteDrastic enlargement of a panoramic camera frame provides a wealth of detail within the small area outlined in AS 15-9591. Note the many large blocks on the slope. The largest block is about 125 mt wide. Most blocks apparently originated at the discontinuous ledge near the top of the slope. Note also the fillets on the upslope side of many of the blocks. They probably consist of fine-grained debris that was trapped behind the blocks as it moved downslope. The arrows identify what appear to be two craters in the process of being destroyed by erosion. Otherwise, craters are absent on the steeply dipping slope, although numerous craters are present on the gentler slopes above.
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APOLLO 16 AS 16 106-17325.jpgAS 16-106-17325 - What a boulder!138 visitePrimo piano del macigno: notevole e davvero suggestivo.
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APOLLO 16 AS 16 106-17393.jpgAS 16-106-17393 - What a boulder!177 visiteE che dire poi di quest'altro masso il quale, anche a giudicare dalla posizione tutta particolare che ha assunto sulla superficie Lunare, dovrebbe essere effettivamente il risultato di un impatto?
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APOLLO 16 AS 16 106-17413.jpgAS 16-106-17413 - Boulder and Astronaut151 visiteEccoVi un'immagine che è di grande aiuto per stabilire un minimo di proporzioni fra le dimensioni del macigno che Vi abbiamo già mostrato nel frame 17412 ed un Astronauta.
Visto da lontano e senza elementi di raffronto questi "boulders" non sembrano grandissimi, e invece...
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