The last time a person stepped foot on the moon was 1972. Now, the moon is back on NASA's space agenda. This time around the agency isn't just visiting -- it's planning to stay.
원문출처 : https://www.cnn.com/style/article/3d-print-lunar-base-moon-dust-spc-intl/index.html
원문출처 : https://www.cnn.com/style/article/3d-print-lunar-base-moon-dust-spc-intl/index.html