73. Will we be able to breathe inside the Space Shuttle? (A K2S Question)

From The Space Library

Yes. Normally the orbiter crew compartment is pressurized at 14.7 pounds per square inch—sea level pressure—with a mixture of oxygen and nitrogen just like the air on Earth. But if for some reason it has to be depressurized, you have to put on a spacesuit. (Ref. 1)

Ref 1.NASA, National Space Transportation System Reference, Volume 1 Systems and Facilities, June 1988. This document is available on the Internet at: http://science.ksc.nasa.gov/shuttle/technology/sts-newsref/stsreftoc.html#sts-umbilical-doors

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Answer provided by Jon H. Brown

Question and Answer extracted from the book Kids to Space - by Lonnie Schorer

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