flying over land in . However, NASA
is working on a quieter version that could
carry passengers in the future.
Airplanes cannot fly in outer space.
There is no air there to provide lift. But
a company in the United Kingdom is
trying to build a spaceplane. It would
be called Skylon. Rocket engines would
propel it from the ground all the way to
outer space.
This Concorde passenger jet could fly more than twice the
speed of sound.
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