The word "stronaut" comes from greek word.What does it mean?

题目

The word "stronaut" comes from greek word.What does it mean?
ISS是什么？宇航员最远到过太空的什么地方？宇航员在太空立会变高还是变矮？

答案

1 It means a man who travels in outerspace by spacecraft or shuttle.2 ISS:International Space Station(国际空间站)3 Moon.4 According to the theory of relativity,the astonaut will become taller when he ...