Are Satellite Transmissions Encrypted?
Can you listen to all satellite transmissions? Are all space and military satellites transmit encrypted signals? Find out about space communication and encryption.
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Why Does the International Space Station Vent Air out of Airlock?
In the ISS airlocks, during the exiting decompression process, it is common practice to vent some air into space before the crew lock doors open. Find out why it is done and how the loss of air is compensated for.
