Free Astronomy Magazine July-August 2019

JULY-AUGUST 2019 and relative ease. The basement turned out to be a lava flow. When the seismic charges deployed in the valley were remotely triggered, they revealed that the thickness of this material exceeded 2 km. Be- fore the experiment on the electri- the original valley floor, and most of the Taurus Mountains ejecta are now submerged. Apollo 17 was the last inhabited lunar mission. In NASA’s initial plans, there were three further missions, 18, 19 and 20, which were cal properties of the surface would overheat, it recorded data consis- tent with this result. The underly- ing pre-Serenitatis basement lies under the range of an impact. Clearly, before the incorporation, the massifs rose almost 6 km above A POLLO 17 − 360° panoramic view of South and North massifs. The astronaut (below) heads for the LRV at the end of the second strip under the reflection of the Sun. A high-resolution version of this image is available at https://www.astropublishing.com/moonscapes/A17_South&North_Massifs_panorama360.pdf [NASA, Project Apollo Archive; image merging by Astro Publishing]