Monday, November 23. 2009Cluster of farside secondary craters Cluster of secondary craters help geologists determine the relative ages of features, even when they are separated by great distances. Image width is 630 meters [NASA/GSFC/Arizona State University]. Continue reading "Cluster of farside secondary craters" Friday, November 20. 2009Central Peak of Rutherfurd LROC NAC view of boulders, on the floor of Rutherfurd crater, about to disappear into the shadows of dusk. Image width is 510 meters [NASA/GSFC/Arizona State University]. Continue reading "Central Peak of Rutherfurd" Tuesday, November 17. 2009Mountains of the Moon Most mountains on the Earth are formed as plates collide and the crust buckles. Not so for the Moon, where mountains are formed as a result of impacts. Images taken looking across the landscape rather than straight down really bring out topography and help us visualize the lunar landscape. However such images can only be taken as the spacecraft rolls to the side, in this case about 70°, so the opportunities are limited. Foreground is about 15 km wide, view is northeast across the north rim of Cabeus crater [NASA/GSFC/Arizona State University]. Continue reading "Mountains of the Moon" Monday, November 16. 2009Dark Craters on a Bright Ejecta Blanket Dark materials excavated by later small impacts show up clearly on the bright ejecta of a small lunar crater (800 meters in diameter) to the west. Image width is 640 meters [NASA/GSFC/Arizona State University]. Continue reading "Dark Craters on a Bright Ejecta Blanket" Monday, November 9. 2009High Noon at Tranquility Base As the Apollo 11 Lunar Module (LM) neared the surface, Neil Armstrong could see the landing area was right on the rough bouldery ejecta of West crater. He had to change the flight plan and fly the LM westward to find a safe landing spot. Image 742 meters wide, north is up [NASA/GSFC/Arizona State University]. Continue reading "High Noon at Tranquility Base" Friday, November 6. 2009Ejecta Blanket Features Interactions between the mobilized material excavated during impact and the pre-existing surface formed dune-like and trough-like features in the ejecta blanket of Galvani B, a 15-km diameter crater. North is up, image resolution is 0.58 m/pixel [NASA/GSFC/Arizona State University]. Continue reading "Ejecta Blanket Features" Thursday, November 5. 2009Landslides in Marius Crater Landslide deposits seen on the steep interior slopes of Marius crater, image is 510 meters wide [NASA/GSFC/Arizona State University]. Continue reading "Landslides in Marius Crater" Wednesday, November 4. 2009Apollo 12 Second Look: Midday on the Ocean of Storms New view of the Apollo 12 landing site in Oceanus Procellarum imaged from the LRO mapping orbit. Small black arrows show locations where astronaut footpaths can be clearly discerned. Image width is 490 meters [NASA/GSFC/Arizona State University]. Continue reading "Apollo 12 Second Look: Midday on the Ocean of Storms" Friday, October 30. 2009More Impact Melt! Frozen impact melt flows on the floor of Moore F, a farside highlands crater. Image width 600 m, 0.61 m/pixel, NAC image M110383422LE [NASA/GSFC/Arizona State University]. Continue reading "More Impact Melt!" Wednesday, October 28. 2009Exploring the Apollo 17 Site The Apollo 17 Lunar Module Challenger descent stage comes into focus from the new lower 50-km mapping orbit, image width is 102 meters [NASA/GSFC/Arizona State University]. Continue reading "Exploring the Apollo 17 Site" Tuesday, October 27. 2009The Floor of Saha E Diverse textures on the floor of Saha E on the lunar farside. Image width is 1.08 km [NASA/GSFC/Arizona State University]. Continue reading "The Floor of Saha E" Friday, October 23. 2009Epigenes A A plethora of boulders surrounds braided flows of impact melt along the inside wall of crater Epigenes A. As the melt moves toward the crater floor (direction indicated by white arrow), the flow buries and moves boulders. Epigenes A is a 18 km diameter crater located at 66.9°N and 0.3°W on the rim of crater W. Bond. The NAC image is 540 meters wide [NASA/GSFC/Arizona State University]. Continue reading "Epigenes A" Wednesday, October 21. 2009Bright Boulder Trail High-albedo marks on the lunar surface left by a boulder bouncing down the northeast wall of farside highlands crater Moore F. Image width is 610 meters [NASA/GSFC/Arizona State University]. Continue reading "Bright Boulder Trail" Tuesday, October 20. 2009Illumination comparison of a mare crater Same crater from two LROC NAC frames under very different lighting. On the left the Sun was midway to the horizon and on the right the Sun was high, approaching noon. Under lower Sun, surface roughness is quite evident; under higher sun (right) variations in brightness (reflectance) dominate the scene [NASA/GSFC/Arizona State University]. Continue reading "Illumination comparison of a mare crater" Monday, October 19. 2009Small crater on the wall of Metius B Fresh crater on the southwest rim of Metius B crater. LROC NAC image width is 740 meters [NASA/GSFC/Arizona State University]. Continue reading "Small crater on the wall of Metius B" |
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