11 Feb 2011
Rimae Bürg is a linear rille, with an average width of 2 km. This rille extends into Lacus Mortis for more than 60 km, and continues into the highland terrain, where it becomes obscured and then reappears as a ridge. Illumination from the left, star is location of LROC NAC [NASA/GSFC/Arizona State University].
10 Feb 2011
Rima Bradley is a northeast/southwest-trending linear rille located between Mare Imbrium and Palus Putredinis (very close to the Apollo 15 landing site). Rima Bradley probably formed as a result of tectonic stresses in the Imbrium basin. LROC WAC monochrome mosaic, illumination from left [NASA/GSFC/Arizona State University].
09 Feb 2011
03 Dec 2010
02 Dec 2010
Vallis Schröteri is a magnificent sinuous rille and of particular interest is its inner rille, which diverges from the primary rille near the arrow. This nested form indicates that multiple eruptive events occurred or there was a large change in the volume of a single eruption over time. LROC WAC mosaic, 100 m/pixel [NASA/GSFC/Arizona State University].
01 Dec 2010
29 Oct 2010
28 Oct 2010
27 Oct 2010
LROC Wide Angle Camera mosaic of Menelaus crater at the boundary between Mare Serenitatis and the highlands (dotted line). Broad ejecta rays extend along the mare-highlands boundary and also in the NE-SW direction. In this image, the ejecta ray extending to the SW is easier to distinguish than the ray extending into Mare Serenitatis. The arrow marks the location of a recent 350 m diameter impact near the rim of Menelaus crater [NASA/GSFC/Arizona State University].
30 Sep 2010
One of the geologic features that makes Copernicus crater special is its extensive, high-reflectance ejecta rays that extend across nearby mare and superpose (overlap) ejecta from other craters - Copernican ejecta extends more than 500 km from the impact site! In this high-Sun image, albedo differences are enhanced and the arrows indicate several "fingers" of ejecta and the direction of ejecta emplacement (away from Copernicus, which is to the southwest). LROC NAC image M127050121L, image width is 470 m [NASA/GSFC/Arizona State University].