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Student volunteers are seen inside the Lunar Palace 1, a laboratory simulating a lunar-like environment, in Beijing on May 10, 2017. Chinese students will live in the laboratory simulating a lunar-like environment for up to 200 days as Beijing prepares for its long-term goal of putting humans on the moon. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, state media reported. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)

Student volunteers are seen inside the Lunar Palace 1, a laboratory simulating a lunar-like environment, in Beijing on May 10, 2017. Chinese students will live in the laboratory simulating a lunar-like environment for up to 200 days as Beijing prepares for its long-term goal of putting humans on the moon. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, state media reported. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)
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Student volunteers wave from inside the Lunar Palace 1, a laboratory simulating a lunar-like environment, in Beijing on May 10, 2017. Chinese students will live in the laboratory simulating a lunar-like environment for up to 200 days as Beijing prepares for its long-term goal of putting humans on the moon. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, state media reported. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)

Student volunteers wave from inside the Lunar Palace 1, a laboratory simulating a lunar-like environment, in Beijing on May 10, 2017. Chinese students will live in the laboratory simulating a lunar-like environment for up to 200 days as Beijing prepares for its long-term goal of putting humans on the moon. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, state media reported. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)
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Four student volunteers take an oath before entering the Lunar Palace 1, a laboratory simulating a lunar-like environment, for an initial 60-day stay, in Beijing on May 10, 2017. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, as Beijing prepares for its long-term goal of putting humans on the moon. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)

Four student volunteers take an oath before entering the Lunar Palace 1, a laboratory simulating a lunar-like environment, for an initial 60-day stay, in Beijing on May 10, 2017. Four postgraduate students from the capital's astronautics research university Beihang entered the 160-square-metre (1,720-square-foot) cabin -- dubbed the "Yuegong-1", or "Lunar Palace" -- on May 10, as Beijing prepares for its long-term goal of putting humans on the moon. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP via Getty Images)
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