美国东部时间6月21日9时45分(北京时间21日21时45分)左右,搭载着美国一家私营企业研发的“宇宙飞船一号”的喷气式飞机从加利福尼亚州莫哈韦沙漠一家机场升空跑道上起飞。约1小时后,这架名为“白色骑士”的飞机飞抵15千米高空,释放出“宇宙飞船一号”。飞船的火箭发动机点火80秒后,飞船加速至3马赫(音速的3倍)飞出地球大气层,抵达约62英里(100千米)的高度,然后落回地球。在重返地球大气层 At about 9:45 on June 21 (21:45 GMT) on the 21st of the U.S. Eastern Time, a jet powered by a privately owned US-based “spaceship” was flown from an airport in the Mojave Desert, California, Take off on the runway. About an hour later, the plane named “White Knight” flew 15 kilometers to release Space Shuttle One. 80 seconds after the spacecraft’s rocket engine ignites, the spacecraft accelerates to Mach 3 (three times the speed of sound) and exits the Earth’s atmosphere to a height of about 62 miles (100 kilometers) before falling back to Earth. Returning to Earth’s atmosphere