Tuesday, February 9. 2010
Overlapping petals of bright ejecta illustrate the complexity of ejecta emplacement, even in smaller impact events. The source crater is ~120 meters in diameter and lies on the floor of Murchison Crater, one of the Constellation regions of interest. Image size is 500-meter x 500-meter from LROC NAC frame M111599349RE; north is up [NASA/GSFC/Arizona State University].
Thursday, February 4. 2010
High-resolution LROC view of part of the floor of Riccioli Crater, near the center of the Constellation region of interest. The view is centered on the boundary between a spur of the crater's central peak materials (lower right half of the image) and volcanic lava flow deposits (upper left half). The central peak materials are rougher and show a faint pattern of lines running NE-SW, suggesting that this terrain, like much of the rest of the crater, was scoured by ejecta from the younger Orientale impact basin to the southwest. Part of NAC frame M114444141LE, image width is 500 m and north is up [NASA/GSFC/Arizona State University].
Tuesday, February 2. 2010
Spectacularly preserved viscous flow on the NE rim of Byrgius A (19 km diameter) crater. This flow has a form similar to lava flows on the Earth - however it formed as a result of an asteroid or comet slamming into the Moon at hyper-velocity (>16 km/second). So much energy was released in the impact that solid rock was melted and thrown out of the crater where it flowed down the crater flanks (M102573276L, image width 810 m) [NASA/GSFC/Arizona State University].
Tuesday, February 2. 2010
The Constellation Program region of interest northwest of Plato crater exhibits a wide variety of geologic features. LROC WAC frame M109269483CE; 695 nm in red, 567 nm in green, 415 nm in blue [NASA/GSFC/Arizona State University].
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