Craggy Peak, Impact Melts |LROC

Northern slope of one of four central peaks in Hayn crater, on the northern edge of Humboldtianum basin. Downslope direction is from top to bottom (North is down), image field of view is 594 meters, sunlight is from upper left. LROC NAC observation M128754462L, orbit 4108, resolution 0.54 meters from 51.78 kilometers. View the full size LROC Featured Image HERE  [NASA/GSFC/Arizona State University].

Hiroyuki Sato

LROC News System

Due to the tremendous energy released by an impact event large portions of the target rock is melted. This impact melt forms distinctive flows and ponds both inside and outside of its parent crater. In many young craters the #LROC-NAC has captured deposits that look as if they formed yesterday.

Today's Featured Image is on the northern slope of the Hayn crater central peak. Due to the peak's steepness, it is rough and craggy. In many places on the peak wavy deposits are seen between crags and blocks; these deposits are most likely impact melt. Truly amazing, first the central peak formed then impact melt splashed down and coated it. If this interpretation is correct you can say that the peak formed in matter of a few seconds, quickly enough that melt that was thrown during the impact had not yet landed! Quantitative measurements of these kind of spectacular outcrops, using new accurate topography from LROC NAC stereo will help reveal how impact craters form.

#LROC QuickMap WAC monochrome 125 meter per pixel projection of Hayn and vicinty, centered at 64.34°N, 83.94°E. The yellow arrow indicates the locations of LROC Featured Image field of view [#NASA/#GSFC/#Arizona-State-University].

Hayn is an exceptionally deep crater because it is situated just within the northern mountainous ring of 550 km-wide Humboldtianum basin, which extends far beyond its deep interior Mare Humboldtianum. The entire basin straddles the 90° east meridian, though Mare Humboldtianum is a nearside basin visible at favorable lunar librations. The floor of Hayn is 4.9 kilometers below global mean elevation and it's northern crater rim is still more than a half kilometer below global mean. The mountain directly north of Hayn, a worn remnant of the Humboldtianum basin rim is 2.3 kilometers above global mean, nearly a seven thousand meter change in elevation over the eighty kilometers between that massif and the center of Hayn. LROC Wide Angle Camera (WAC) 100 meter per pixel digital terrain model, color shaded relief, orthographic projection centered on 60° east [NASA/GSFC/Arizona State University].

Explore the craggy peak and impact melt deposits, both on the peak and the floor of Hayn crater, HERE.

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Wrinkled Planet |LROC

Intricate fault patterns enhanced by dawn lighting in Seares crater (Sun is shining from lower right). North is up, image width is 2800 meters,

M130681684LR [NASA/GSFC/Arizona State University].

quell: nasaLRO

Moon |Lunar |North |Pole

Summer-time at the lunar north pole captured by the LROC Wide Angle Camera (WAC), width ~600 km, latitude ranges from 80°N to 90°N [NASA/GSFC/Arizona State University].

quelle: Continue reading 'The Lunar North Pole

A pin pricked me |Moon

Die Einschläge der Centaur-Raketenstufe und der Sonde LCROSS in den Krater Cabeus in der Nähe des Mondsüdpols verliefen zwar erfolgreich, stellten aber zumindest in visueller Hinsicht eine Enttäuschung dar. Der Lichtblitz des Einschlags fiel wesentlich kleiner aus als erwartet, von einer spektakulären Staubwolke war von der ERDE nichts zu sehen. Auch die Staubwolke fiel offensichtlich wesentlich kleiner aus als erwartet, die NASA hatte zuvor mit einem Materialauswurf von rund 350 Tonnen sowie mit einer zehn Kilometer hohen und von der Sonne angestrahlten Staubwolke gerechnet. NASA-Specialisten sind eben auch nur Menschen!?
Wahrscheinlich ist die Staubwolke einfach nicht hoch genug aufgestiegen, um von der Erde aus sichtbar zu sein. Eindeutige Informationen dürften die Daten des Lunar Reconnaissance Orbiter (LRO) und das Hubble-Weltraumteleskops liefern, die bisher noch nicht vorliegen.

Quelle: internet, NASA