| Risultati della ricerca nelle immagini - "boulders" |
101955-Bennu-011.jpg101955 Bennu - Boulderland64 visiteCaption NASA:"An abundance of Boulders litters the Surface of the Asteroid 101955 Bennu in this dramatic close-up from the OSIRIS-REx Spacecraft.
Taken on March 28 from a distance of just 3,4 Km (approx. 2,1 miles) the field of view is about 50 meters across while the light colored boulder at top right is about 4,8 meters tall.
Likely a loose conglomerate rubble pile Asteroid, Bennu itself spans less than 500 meters. That's about the height of the Empire State Building.
Mapping the near Earth Asteroid since the Spacecraft's arrival in December of 2018, the OSIRIS-REx mission plans a TAG (Touch-and-Go) maneuver for July 2020 to sample Bennu's rugged Surface, returning the sample to planet Earth in September 2023. Citizen scientists have been invited to help choose the sample collection site". MareKromium
|
|
101955-Bennu-011.png101955 Bennu - Just like Itokawa (Natural Colors; credits for the additional process. and color.: E. Bonora & Marco Faccin)211 visiteNotate la posizione "anomala" e "sporgente" dei mega-boulders (mega-macigni) visibili. Bizzarro, vero?!? La "causa" della nascita di 101955 Bennu? Aggregazione Gravitazionale di detriti. Cos come Itokawa. Asteroidi fragili, polverosi e senza crateri. Ere di "lavoro" (miliardi di anni terrestri) e questo ne un (altro esempio di) risultato.MareKromium
|
|
162173-Ryugu-000.jpg162173 Ryugu111 visiteLe caratteristiche superficiali di questo Asteroide della "Classe Apollo" lo rendono incredibilmente simile ad ALMENO altri due Asteroidi che ben conosciamo: 25143 Itokawa e 101955 Bennu. Tutti (almeno in teoria...) formatisi per "aggregazione gravitazionale di corpuscoli".
Interessanti, per tanti motivi. Ma soprattutto perch sono, di fatto, degli Asteroidi quasi completamente identici: nessun Cratere da Impatto e Boulders "enormi" ben visibili nelle loro immagini di profilo (tipo "Skyline").
A questo punto bisogna ammettere che i Tecnici della JAXA (l'Agenzia Spaziale Giapponese) hanno un "occhio" ed una "mira" davvero eccezionali! Chiss, oltre le dichiarazioni di facciata, che cosa stanno cercando... Volete un'ipotesi? Magari l'Origine della Vita sulla Terra. Oppure le modalit attraverso le quali questi Asteroidi non solo si formano, ma poi "sopravvivono", nonostante la loro "fragilit", alle Onde Gravitazionali (vedi: Limite di Roche) ed alle Ere (e qui parliamo di miliardi di anni).MareKromium
|
|
20000217a-PCF-LXTT-IPF.jpgOrbiting 433-Eros (Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)146 visiteCaption NASA:"This picture of 433-Eros, the first of an Asteroid taken from an orbiting spacecraft, is a mosaic of 4 images obtained by NEAR on February 14, 2000, immediately after the Spacecraft's insertion into orbit. We are looking down over the North Pole of Eros at one of the largest craters on the surface, which measures 4 miles (about 6 Km) across. Inside the crater walls are subtle variations in brightness that hint at some layering of the rock in which the crater formed. Narrow grooves that run parallel to the long axis of Eros cut through the South-Eastern part of the crater rim. A house-sized boulder is present near the floor of the crater; it appears to have rolled down the bowl-shaped crater wall. A large number of boulders is also present on other parts of the Asteroid's surface. The surface of the Asteroid is heavily cratered, indicating that 433-Eros is relatively old.
(Mosaic of images 0125956839, 0125957025, 0125957087, 0125957273)MareKromium
|
|
20000217b.jpgOver Eros' horizon (natural colors; credits: Lunexit)53 visiteThis incredible picture of Eros, taken on February 14, 2000, shows the view looking from one end of the asteroid across the gouge on its underside and toward the opposite end. In this mosaic, constructed from two images taken after the NEAR Spacecraft was inserted into orbit, features as small as 120 feet (35 meters) across can be seen.
House-sized boulders are present in several places; one lies on the edge of the giant crater separating the two ends of the asteroid. A bright patch is visible on the asteroid in the top left-hand part of this image, and shallow troughs can be see just below this patch.
The troughs run parallel to the asteroid's long dimension.
(Mosaic of images 0125971425, 0125971487)MareKromium
|
|
20000307.jpgLooking at "The Saddle" (natural colors; credits: Lunexit)52 visiteThis image of the interior of Eros' "Saddle Area", taken at a range of 204 Km (about 127 miles), displays a paucity of craters compared to the surface on the right hand side of the image. The Saddle displays many interesting structural features. Visible on the left wall are a series of closely spaced grooves that follow the terrain downslope. Opposite, on the upper right wall, trending towards the back of the saddle is a prominent ridge. Boulders are visible throughout this image.
Features as small as 20 meters (65 feet) are discernable.
(Image 0127521108)MareKromium
|
|
20000309.jpgOblique view of the "Large Crater" (natural colors; credits: Lunexit)52 visiteThis image, showing an oblique view of Eros' "Large (central) Crater", was taken at a resolution of about 20 meters (65 feet) per pixel. The brightness or albedo patterns on the walls of this crater are clearly visible, with the brighter materials near the tops of the walls and darker materials on the lower walls. Boulders are seen inside this crater and the smaller nearby craters. The higher density of craters to the left of the large crater implies that this region is older than the smoother area seen associated with the Saddle Region on the opposite side of the asteroid.
(Image 0127591846)MareKromium
|
|
20000314-PCF-LXTT-IPF.jpgThe "Saddle Region" (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)102 visiteCaption NASA:"This image mosaic, showing Eros' Saddle and a shadowed feature to its left, was taken on March 3, 2000 from a distance of 204 Km (about 127 miles). In this picture features as small as 20 meters (65 feet) across are visible. This is the best view to date of this area. The Sun is coming from the North-East illuminating a shadowed feature that consists of 3 large craters situated adjacent to each other. The two largest are each about 4-5 Km (2-3 miles) across.
Because the Sun is very low with respect to these craters, even small topographic features cast long shadows, making them easier to see. As a result, several boulders on the crater walls can be distinguished, ranging from about 50 to 100 meters in diameter. The Saddle (on the right of the mosaic) is relatively smooth with few impact craters, and has several grooves running across it. At the top of the saddle are several curved grooves that are brighter than the surrounding surface. Unusual brightness patterns are also visible in the crater at the top left of the mosaic. The walls of the crater appear to be more reflective and its floor less reflective than nearby parts of the asteroid.
(Mosaic of images 0127504836, 0127504898, 0127505146, 0127505208,0127505394, 0127505456)MareKromium
|
|
20000418.jpgUp-close and personal (natural colors; credits: Lunexit)52 visiteSince April 11, 2000, the NEAR Shoemaker Spacecraft has orbited Eros at an altitude of about 100 Km (approx. 62 miles) from the Asteroid's Center. Images acquired from this orbit will be used to make a HR map of the illuminated portion of the Asteroid. Each spot on the surface will be imaged under a variety of lighting and viewing conditions to bring out different features.
In this image, taken April 17, 2000, from a height of 101 Km (approx. 63 miles), the shadows highlight small-scale surface features. The surface is pockmarked with craters ranging in size up to the 2,8-Km (1,74-mile) diameter crater in the center of the image. The smallest craters which can be resolved are about 20 meters (65 feet) across.
In lower right corner of the image, 20-meter boulders can be seen that were not evident in images from higher altitudes.
(Image 0131288775)MareKromium
|
|
55-Luna13 - Panorama-01.jpgLunik 13: Oceanus Procellarum (1)251 visiteGrazie all'Amico Fabio Italiano (alias "OldGrey"), andiamo ancora una volta a gettare uno sguardo sul passato - diremmo ormai remoto... - dell'esplorazione Lunare e, nel contempo, riusciamo a trovare degli interessantissimi argomenti di discussione su un paio di (presunte) Anomale di Superficie.
Siamo nel 1966, quando la Sonda "Luna 13" viene inviata verso la Luna, per un "soft landing" nell'Oceano delle Tempeste (Oceanus Procellarum). In questa immagine ("spezzata", a causa delle sue cospicue dimensioni, in 3 frammenti) possiamo trovare 2 elementi anomali che caratterizzano i dintorni della Sonda e che sono gi ben visibili nel frame n. 1.
Si tratta di boulders? Si tratta di "manufatti"? Sono illusioni ottiche? O forse si tratta di due pezzi della Sonda la quale, probabilmente, non allunata esattamente "con leggerezza"?
Andiamo a vedere...
|
|
APOLLO 11 AS 11-37-5467.jpgAS 11-37-5467 - The Flag (3)419 visiteLa panoramica continua. L'immagine ancora - leggermente - fuori fuoco. Il paesaggio Lunare, adesso, comincia ad esserci familiare. per esempio: avete gi notato quei tre macigni (boulders) che sembrano disegnare una sorta di triangolo (quasi) rettangolo, in alto, sopra la Bandiera, a Sn dell'Osservatore? Un consiglio: annotateVi sempre bene i dettagli: servono sia come punti di riferimento a terra, sia come promemoria per valutare eventuali incongruenze di sfondo, tra un frame e l'altro.
|
|
APOLLO 11 AS 11-40-5850 HR-01.jpgAS 11-40-5850 - The first "Moon-Shot" (HR)149 visiteOriginal caption:"109:30:53 MT - First EVA picture. Neil's first Pan from West of the ladder.
Jettison bag under the Descent Stage, South footpad, bent probe, strut supports, more or less up-Sun so we are seeing the shadowed faces of boulders.
There is a fair sized crater East-SouthEast of the footpad - probably East Crater - which Neil will visit at the end of the EVA".
|
|
| 262 immagini su 22 pagina(e) |
1 |
 |
|
|
|
|
|
|
|
|
|
