Editing Apollo 16 (section)

==== Second moonwalk ====
[[File:Young and Rover on the Descartes - GPN-2000-001133.jpg|thumb|upright=1.3|right|The view from the side of Stone Mountain, which Duke described as "spectacular"<ref name=station4/>]]

Waking up three and a half minutes earlier than planned, they discussed the day's timeline of events with Houston.<ref>{{cite web|title=EVA-2 Wake-up|url=http://next.nasa.gov/alsj/a16/a16.eva2wake.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|url-status=dead|archive-url=https://web.archive.org/web/20111017000524/http://next.nasa.gov/alsj/a16/a16.eva2wake.html|archive-date=October 17, 2011|date=January 15, 2006}}</ref><ref>{{cite web|title=Preparations for EVA-2|url=http://next.nasa.gov/alsj/a16/a16.eva2prep.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|url-status=dead|archive-url=https://web.archive.org/web/20111021105700/http://next.nasa.gov/alsj/a16/a16.eva2prep.html|archive-date=October 21, 2011|date=May 9, 2010}}</ref> The second lunar excursion's primary objective was to visit Stone Mountain to climb up the slope of about 20 degrees to reach a cluster of five craters known as "[[Cinco (crater)|Cinco craters]]". They drove there in the LRV, traveling {{convert|3.8|km|mi|abbr=on|sp=us}} from the LM. At {{convert|152|m|ft|abbr=on|sp=us}} above the valley floor, the pair were at the highest elevation above the LM of any Apollo mission. They marveled at the view (including South Ray) from the side of Stone Mountain, which Duke described as "spectacular",<ref name=station4>{{cite web|title=Geology Station 4 at the Stone Mountain Cincos|url=http://next.nasa.gov/alsj/a16/a16.sta4.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|url-status=dead|archive-url=https://web.archive.org/web/20111025050902/http://next.nasa.gov/alsj/a16/a16.sta4.html|archive-date=October 25, 2011|date=July 19, 2011}}</ref> then gathered samples in the vicinity.<ref name=honeysuckle/> After spending 54 minutes on the slope, they climbed aboard the lunar rover en route to the day's second stop, dubbed Station 5, a crater {{convert|20|m|ft|abbr=on}} across. There, they hoped to find Descartes material that had not been contaminated by ejecta from South Ray Crater, a large crater south of the landing site. The samples they collected there, despite still uncertain origin, are according to geologist Wilhelms, "a reasonable bet to be Descartes".<ref name=honeysuckle/>

The next stop, Station 6, was a {{convert|10|m|ft|abbr=on|adj=mid|-wide|sp=us}} blocky crater, where the astronauts believed they could sample the Cayley Formation as evidenced by the firmer soil found there. Bypassing station seven to save time, they arrived at Station 8 on the lower flank of Stone Mountain, where they sampled material on a ray from South Ray crater for about an hour. There, they collected black and white breccias and smaller, [[crystal]]line rocks rich in [[plagioclase]]. At Station 9, an area known as the "Vacant Lot",<ref>{{cite web|title=Geology Station 9|url=https://www.hq.nasa.gov/alsj/a16/a16.sta9.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|access-date=September 23, 2021|date=May 1, 2018|archive-date=June 8, 2021|archive-url=https://web.archive.org/web/20210608152734/https://www.hq.nasa.gov/alsj/a16/a16.sta9.html|url-status=live}}</ref> which was believed to be free of ejecta from South Ray, they spent about 40 minutes gathering samples. Twenty-five minutes after departing the Vacant Lot, they arrived at the final stop of the day, halfway between the ALSEP site and the LM. There, they dug a double core and conducted several [[penetrometer]] tests along a line stretching {{convert|50|m|ft|abbr=on}} east of the ALSEP. At the request of Young and Duke, the moonwalk was extended by ten minutes. After returning to the LM to wrap up the second lunar excursion, they climbed back inside the landing craft's cabin, sealing and pressurizing the interior after 7{{nbsp}}hours, 23 minutes, and 26 seconds of EVA time, breaking a record that had been set on Apollo 15.<ref name="honeysuckle" /><ref>{{cite web|title=EVA-2 Closeout|url=http://next.nasa.gov/alsj/a16/a16.clsout2.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|url-status=dead|archive-url=https://web.archive.org/web/20111026042001/http://next.nasa.gov/alsj/a16/a16.clsout2.html|archive-date=October 26, 2011|date=July 28, 2011}}</ref> After eating a meal and proceeding with a debriefing on the day's activities with Mission Control, they reconfigured the LM cabin and prepared for the sleep period.<ref>{{cite web|title=Post-EVA-2 Activities and Goodnight|url=http://next.nasa.gov/alsj/a16/a16.eva2post.html|publisher=[[NASA]]|editor-first=Eric M.|editor-last=Jones|editor2-first=Ken|editor2-last=Glover|work=Apollo 16 Lunar Surface Journal|url-status=dead|archive-url=https://web.archive.org/web/20120425231519/http://next.nasa.gov/alsj/a16/a16.eva2post.html|archive-date=April 25, 2012|date=September 25, 2011}}</ref>