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PSP_010397_1725_RED_abrowse-00.jpgLight-Toned Rock Exposures in Noctis Labyrinthus OR Salty "Outlines"? (ctx frame - Natural Colors; credits: Lunar Explorer Italia)62 visitenessun commentoMareKromium
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SOL1976-GB1.jpgSearching in the Sands... - Sol 1976 (Natural Colors; credits: Dr G. Barca)62 visitenessun commentoMareKromium
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SOL1977-GB.jpgDeep Rover Tracks - Sol 1977 (possible True Colors; credits: Dr G. Barca)62 visitenessun commentoMareKromium
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Solar_Eclipse~0.jpgA "Diamond Ring" among the clouds62 visiteDa "NASA - Picture of the Day" del giorno 8 Agosto 2009:"Cloudy skies over Wuhan, China hid the delicate Solar Corona during July's Total Eclipse of the Sun. Still, the Moon's silhouette was highlighted by these glistening diamonds as the Total Eclipse Phase ended. Caused by bright Sunlight streaming through dips and valleys in the irregular terrain along the Moon's edge, the effect is known as Baily's Beads, named after Francis Baily who called attention to the phenomenon in 1836.
The dramatic appearance of the beads at the beginning or end of a Total Solar Eclipse is also known as the Diamond Ring effect. In this remarkable image, a small, pinkish solar prominence can also be seen along the edge, below the diamonds".MareKromium
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SOL2006-MF2-LXT.jpgControversial Surface Feature - Sol 2006 (Superdefinition and Natural - but enhanced - Colors; credits: Dr M. Faccin & Lunexit)62 visitenessun commentoMareKromium
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ESP_014159_1670_RED_abrowse-00.jpg"Worm-like" Surface Feature in the Southern Highlands (ctx frame - Natural Colors; credits: Lunexit)62 visitenessun commentoMareKromium
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ColorfulReality.jpgEmissions (by Marco Faccin)62 visitenessun commentoMareKromium
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Omega_Centauri-HST.jpgThe Center of Omega Centauri62 visite"...Feliciter sapit qui periculo alieno sapit..."
(Binder)
"...Realmente saggio è colui che apprende dall'esperienza altrui..." (trad. libera)MareKromium
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OPP-SOL1997.jpgBlock Island in Natural Colors - Sol 1997 (credits: Dr G. Barca)62 visitenessun commentoMareKromium
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ESP_014272_1245_RED_abrowse.jpgEsker in Southern Argyre Planitia (Natural Colors; credits: Lunexit)62 visiteThough a variety of origins have been proposed, this sinuous, layered, boulder-filled deposit in the Southern Argyre Planitia is likely an "Esker".
"Eskers" form in wet-based glaciers, when water flows inside or below the glaciers and deposits sediment. After the ice melts, the sediment is left behind as a ridge.
Because the material is deposited by flowing water, the sediment in Eskers is sorted: larger rocks, pebbles, sand grains, etc. are deposited first, and smaller sediment - such as smaller pebbles, sand, or clay - are deposited further from the source and on top of the coarser material.
Several factors (including the amount of sediment available, the speed and volume of the flowing water, and the slope over which it flowed) determine how much sediment is deposited and how large the dominant grain size is. There may be many of these sequences preserved within an Esker.
Eskers look a little like Inverted River Beds. One relatively simple way to differentiate between the two is that IRBs record flow in a downhill direction along their entire length.
Eskers, on the other hand, can record flow both down- and uphill. This is possible because water flowing through the ice tunnels in glaciers is under pressure, just like water in a hose.
This particular Esker is part of a branching and braided network of Ridges in the Southern Argyre Basin.
The boulders are on the order of 1-3 meters (about 3-10 feet) in diameter.MareKromium
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NGC-6888~1.jpgNGC 6888 - The "Crescent Nebula"62 visite"...Nemo unquam imperium flagitio quaesitum bonis artibus exercuit..."
(Tacito)
"...Nessuno ha mai esercitato bene il potere che acquisì malamente (con frode o violenza)..."MareKromium
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LRO-1006-392811main_vlcsnap-2009-10-09-04h20m01s95_full.jpgLCROSS impacting the Moon62 visiteThe LCROSS mission operations team initiated power-up of the LCROSS science payload and saw this view of the Moon.MareKromium
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