RocketSTEM Issue #12 - July 2015 | Page 31

sweat for the last seven hours. To aid movement, their gloves had been designed to fit tightly against the tips of their fingers; the pressure and the pain was on the ends of the nails. Irwin resolved to cut his nails and advised his commander to do the same, but for some reason—perhaps fearful that it might compromise his own dexterity on the surface—Scott declined. Irwin was also uncomfortable. A problem with his drinking water bag had left him absolutely parched for more than seven hours. “There was a nozzle that you’d bend down to open a valve so you could suck the water out and drink it within the protection of the space suit,” he explained, “but I could never get my drink bag to work and I never got a single drink of water during the whole second night on the Moon. “Settled” probably was not an appropriate word, for conditions inside Falcon cannot have been pleasant: with the presence of all the rocks and soil specimens, the smell of the Moon—a strong, gunpowder-like aroma—pervaded the air and dust covered everything. They stashed their filthy suits at the back of the cabin, making sure that the gloves were fitted, so as not to impair their seals, then debriefed to Houston and bedded down for their second night’s sleep on the Moon. The next two EVAs would bring tremendous scientific discoveries, which continue to resonate to this day. Early on 1 August, Capcom Gordon Fullerton woke Scott and Irwin with some unwelcome news. Two days earlier, the lunar module During EVA 2, Irwin and Scott collected rock and soil samples, a core sample, and trench samples of an area about 5 km southeast of the Lunar Module. Credit: NASA via Retro Space Images time I was out on the surface of the Moon.” He did, however, manage to gobble down a fruit stick inside his helmet…and that helped him to keep going when the time came to assemble the ALSEP. Now, having doffed his suit, Irwin guzzled water like a jogger, then settled down with Scott for their Falcon had touched down at a slight angle—one of its legs had set down in a crater—and this had caused it to lose a sizeable amount of water. Fullerton asked the men to check behind the ascent engine cover. He was right and the astronauts quickly scooped it into a spent lithium hydroxide canister. Scott and Irwin’s second Moonwalk was slightly shorter than their first, in order to provide more exploration and less traveling time between geological stops. One relatively lowpriority activity had been eliminated and a greater measure of freedom was given to the efforts of the astronauts; Mission Control and the geologists in Houston would depend heavily upon their descriptions and observations and it would be Scott and Irwin’s choice on exactly where they chose for their major sampling. “We’re looking now, primarily, for a wide variety of rock samples from the [Apennine] Front,” Capcom Joe Allen told them. “You’ve seen the breccias already. We think there may very well be some large crystal[line] igneous [rocks] and we’d like samples of those and whatever variety of rocks which you’re able to find for us—but primarily a large number of documented samples and fragment samples.” Scott was in full agreement; Allen was talking their language and after two years of geological training he felt ready and confident to explore. A few minutes before 9:00 a.m. EDT on 1 August 1971, safely buckled aboard the lunar rover, the astronauts set off due south, heading for Mount Hadley Delta, upon whose slopes they would concentrate their energies. It was a scenic trip, Irwin recalled in his memoir, To Rule the Night. Ahead of them, and all around them, the terrain was literally splattered with craters, right up the slopes of Hadley Delta, and the height of the mountain rivaled ѡ