How high is the "blue sky"?
"Blue sky" is equal to the Earth's atmosphere. The thickness of the atmosphere is about 1000 kilometers or more, but there is no obvious boundary.
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Space trivia:Why didn't the birds flow into space? -
Cosmic trivia:What was the universe before the big bang? -
Sleeping trivia:How do astronauts sleep in space? -
Earth trivia:Where is the water on the earth? -
Space station trivia:Will the International Space Station in space rust? -
Astronaut Trivia:After the astronauts died in space, can the body not be transported back to Earth?
