The Image of the Week for 20th February 2012 featured exploding boulders, discovered by Dr Anthony Cook, in Schiller crater which is located in the southwestern region of the Moon, south of Oceanus Procellarum at coordinates 51.8 S / 40.0 W. This crater is interesting in its own right apart from the exploding boulders!
Schiller crater is one of the most uniquely shaped craters on the Moon and its formation is still a bit of a mystery. It is elongated as if it had been stretched lengthwise at some point but was probably created by a grazing (oblique) impact or is a secondary impact crater. At least one article claims that it was created by a multiple impact, i.e. the impacting object broke up just before hitting the Moon (see Formation of Irregular Craters on the Moon below).
The crater is approximately 180 km in length and 70 km wide.
The image below is an LROC WAC Global 100 meter mosaic draped over the laser altimetry (LOLA) digital elevation model as seen from an imaginary point 65 kilometers over the elongated crater’s southeast.
Credit: NASA/GFSC/Arizona State University
An interesting article about boulders and boulder tracks around the central peak complex of Schiller crater. Some worthwhile images in the article.
LROC: A Recent Journey
Happy 4th of July to all stateside Moon Zooites!
Back in April Moon Zoo forum regular JFincannon drew our attention to a batch of LRO images taken at oblique angles. The resulting NAC images needed the application of an appropriate stretch. 5:1 is a rough guide but doesn’t work for all of them and we are still trying to fathom a way to calculate the correct ratio for each image. However, our results so far are pretty amazing and show views of the lunar landscape up close and personal. So sit back and enjoy something a little different in this week’s composite Image(s) of the Week. There are more pictures and debate over in the forum thread.
Jules is a volunteer moderator for the Moon Zoo forum