The fastest a spaceship has returned to Earth with astronauts aboard was the 24, 700 MPH (39, 700 KPH) re-entry of Apollo 10 in 1969, Byerly added.

最快的一艘返航载人航天飞机是1969年返回地球时速为24700英里(39700千米)的阿波罗10号，拜尔利补充说。

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Two pilots aboard the fledgling spaceship and two on the 747 put their lives on the line to find out.

两名飞行员乘坐飞船和羽翼未丰的747提上了自己的生命，找出两个。

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The 53-year-old Hadfield launched aboard the Russian Soyuz spacecraft in December and in March became the first Canadian to lead a spaceship as commander of the International Space Station.

CNN: Astronaut sings Bowie's 'Space Oddity' in zero gravity

Two million: The number of air miles clocked up by British businessman Alan Watts to win the chance to become the first "air miles astronaut" aboard a Virgin Galactic spaceship in 2009.

CNN: The day in numbers: Two million