a person who travels in space
Three astronauts were on a journey to the Moon.
interesting
getting and holding someone's attention
The Moon was very interesting!
rocket
a tubelike device containing combustibles that on being ignited liberate gases that propel the object into the sky
In 1969, a rocket blasted off from Earth.
sign
a notice giving information, directions, a warning, etc.
They also left a sign on the Moon.
step
to press down with the foot
Neil Armstrong was the first man to step on the Moon.
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