Bouncing Boulders on The Far Side of the Moon “Southwest of Rowland crater on the Moon’s farside, a 15 km diameter unnamed crater exhibits many boulder trails on the crater walls in this Lunar Reconnaissance Orbiter image. The boulders range from 1 m to 15 m across and mark a path downslope to the crater floor from a higher elevation.” Bouncing Boulder on Mars Blocks a Slope Streak “A boulder […]

This image was taken by the High Resolution Imaging Science Experiment (HiRISE) aboard the Mars Reconnaissance Orbiter. USGS Dune Database Entry (ESP_014426_2070) Credit: NASA/JPL/University of Arizona Larger image and further information.

“This is an image of Earth and the Moon, acquired at 5:20 a.m. MST on 3 October 2007, at a range of 142 million kilometers, which gives the HiRISE image a scale of 142 km/pixel and an Earth diameter of about 90 pixels and a Moon diameter of 24 pixels. The phase angle is 98 degrees, which means that less than half of the disks of the Earth and Moon […]