16 Apr 2010
The third and final EVA of Apollo 15 brought the astronauts to the edge of Hadley Rille (lower left). Disturbed regolith is observed along the crater rim at station 9 and at the edge of the rille at station 9A. Rover tracks are visible between stations 9A and 10. Image width is 520 m, 0.52 m/pixel, LROC NAC M111571816R [NASA/GSFC/Arizona State University].
15 Apr 2010
14 Apr 2010
13 Apr 2010
The Apollo 15 Lunar Laser Ranging RetroReflector (LRRR) array is one of four such working arrays on the surface of the Moon. As the largest (105 x 65 cm in size) it serves as the primary target for laser ranging to the Moon. In this calibrated image it appears as the (circled) tiny white rectangular feature farthest to center left (near the edge of the original NAC image). The distance to these retroreflectors from the Earth can be and is still routinely measured to the centimeter level or better, and their relative positions are known to a similar level. Such measurements can be used for several purposes, such as precisely determining the orientation and orbit of the Moon, testing gravitation and general relativity theories, and for establishing a highly precise latitude and longitude coordinate frame for the Moon. The image width is 391 meters, with a pixel width of 52 cm. Subset of NAC frame M111578606LE [NASA/GSFC/Arizona State University].
08 Apr 2010
07 Apr 2010
02 Apr 2010
LROC NAC closeup of a fracture in the floor of Alphonsus crater. Dark pyroclastic materials are intermixed with lighter rocks and boulders from the fracture walls and all appear to have moved in streamers toward the fracture floor at upper right. A NASA Constellation site is centered just to the southeast of this view. Image width is 538 m, NAC image M111606491L [NASA/GSFC/Arizona State University].
01 Apr 2010
30 Mar 2010
High resolution LROC image of floor of the Apollo Basin, a large (538 km diameter) double-ringed impact crater in the southern hemisphere of the far side. This image shows part of the boundary between two flow units within the volcanic mare deposits on the crater's floor. The sharp boundary between the topographically higher lavas on the right side of the image and the lower ones on the left reveals layers, suggesting that multiple volcanic events were involved in forming some of the isolated volcanic plateaus seen within the otherwise uniform crater floor lava flows. Both the high and low materials here are heavily covered in impact craters, indicating that these lavas, like much of the Moon's surface, are ancient. Many boulders can also be seen shedding out of the upper layers and eroding down onto the lower deposits. Image is 880 meters wide, and north is up. Part of NAC frame M114953774LE [NASA/GSFC/Arizona State University].
29 Mar 2010
A small secondary crater chain near the southwestern margin of Mare Orientale, within the Inner Rook Mountains. The ~125-meter-long chain lies within one of the Constellation Program regions of interest in the Orientale multi-ring basin. Image is about 530 meters across, M112224591R [NASA/GSFC/Arizona State University].