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经过15个月的在轨飞行,执行秘密任务的美国第2架X-37B轨道试验飞行器于当地时间2012年6月16日在范登堡空军基地着陆。X-37B于2011年3月5日用宇宙神-5火箭从卡纳维拉尔角空军基地发射升空,原以为它只会比第一架X-37B在轨飞行时间稍微长一些,但是美军方大大增加了它的在轨飞行时间。可在太空停留1 8个月2010年4月22日,美国用宇宙神-5火箭发射首架X-37B。它于2010年12月3日在美国加利福尼亚
After 15 months of on-orbit, the second U.S. X-37B orbital test aircraft under the covert mission landed at Vandenberg AFB on June 16, 2012. The X-37B launched its spacecraft from the Cape Canaveral AFB on 05 March 2011 with the Cosmos-5 rocket and thought it would only be slightly longer in orbit than the first X-37B, but The U.S. military has greatly increased its on-time flight time. Can stay in space for 18 months On April 22, 2010, the United States launched the first X-37B with the Cosmic God-5 rocket. It was December 3, 2010 in California, USA