事件：1986年1月28日，挑战者号航天飞机在起飞73秒后爆炸，机上所有宇航员全部遇难。

What happened: on January 28, 1986 the Space Shuttle Challenger broke apart 73 seconds after takeoff, killing all the astronauts on board.

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你知道吗，所有飞往月球的阿波罗号航天飞机必须每一秒钟都做路径的更正。

Did you know that in all the Apollo flights to the moon the shuttles had to do course corrections literally every second?

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热火- 1x号燃烧了60秒并产生了将近9,000磅(4,100)的推力。

HEAT-1X burns for 60 seconds and generates almost 9, 000 pounds (4, 100 kilograms) of thrust.

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