NASA Turns Failure Into Success
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Question 1 / 5
atmosphere (n.)
atmosphere (n.)
"At that height the atmosphere is as thin as that over Mars."
What is an atmosphere?
![](https://gdb.voanews.com/ede3c1b9-3e85-452e-aa8f-6a1643ebd07c_w250_r1_s.jpg)