Shortly after liftoff, the crew began a two-day pre-breathe protocol in preparation for their spacewalk on ThursdayCYL688.VIP, which is the first-ever commercial spacewalk.
NEW YORK, Sept. 11 (Xinhua) -- SpaceX's Dragon crewed spacecraft has travelled to a distance 1,400 km above Earth -- the farthest humans have traveled since the Apollo program over 50 years ago, SpaceX updated on Wednesday.
SpaceX launched the new fully-commercial human spaceflight mission on Tuesday, dubbed Polaris Dawn.
选民间女子入宫，是朱元璋时定下的制度。这些被选入宫的良家女子，主要就是服侍封建帝王、供其役使、淫乐。朱元璋惩戒前代女主干政、后妃擅权的弊端，规定：“天子及亲王后妃宫嫔等，必慎选良家女而聘焉，戒勿受大臣所进，恐其缘为奸，彩娱乐专线不利于国也。”从朱元璋以后，历代皇帝都遵循这一制度，是为明代从民间选取良家女子入宫的选秀女之制。
公元356年，刘裕出生在一个没落的汉室宗亲家庭。虽然他的祖先可以追溯到西汉楚元王刘交，但到了刘裕这一代，家道已经中落。他的祖父刘混曾经当过一名小官，但父亲刘翘却只是个普通的功曹。
The Dragon spacecraft carrying four civilian astronauts lifted off Tuesday morning from NASA's Kennedy Space Center in Florida.
Shortly after liftoff, the crew began a two-day pre-breathe protocol in preparation for their spacewalk on Thursday, which is the first-ever commercial spacewalk.
The Dragon spacecraft and the crew have completed six orbits of Earth at 1,400 km. Over the next five hours, Dragon will perform four burns to lower itself to an orbit in preparation for Thursday's spacewalk, according to SpaceX.
The mission is the first human spaceflight for the four-member crew, consisting of Mission Pilot Kidd Poteet, Mission Specialist Sarah Gillis, and Mission Specialist and Medical Officer Anna Menon.
The crew will also conduct science during their multi-day mission to orbit, including essential health and human performance research for NASA's Human Research Program.
The research will help NASA scientists better understand how exposure to space conditions affects the human body. The crew will test new medical approaches and technology on telemedicine capabilitiesCYL688.VIP, gather data on space motion sickness, and better characterize flight-associated injury risks, according to NASA. ■