Chris L Peterson wrote:
The foam came off the ET after the SRBs were jettisoned. So the shuttle
was 40 miles high, maybe more. Not a hard vacuum, but close enough if
you had to suck it.
Assuming a scale height of 8 km (5 mi), it's about a third of a millibar.
Less than what you get on Mars.
--
Brian Tung
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