Harrison Schmitt credits the image to the entire Apollo 17 crew. While on the Moon's surface, Schmitt — the only geologist in the astronaut corps — collected the rock sample designated Troctolite 76535, which has been called "without doubt the most interesting sample returned from the Moon". Among other distinctions, it is the central piece of evidence suggesting that the Moon once possessed an active magnetic field. As he returned to the Lunar Module before Cernan, Schmitt is the next-to-last person to have walked on the Moon's surface. After the completion of Apollo 17, Schmitt played an active role in documenting the
Liu Yang (astronaut) hours of flying experience. After two years of astronaut training, Liu excelled in testing before being selected with another woman, Wang Yaping, as a candidate for the astronaut corps. Liu was selected for the crew of Shenzhou 9, the first manned mission to the Chinese space station Tiangong 1, along with Jing Haipeng, the first repeat Chinese space traveller, and Liu Wang. Liu became the first female Chinese astronaut to go into space. The mission was launched on June 16, 2012, 49 years to the day after the first female space traveller, cosmonaut Valentina Tereshkova was launched. During this manned