Kármán Line is a boundary located at 100 km above sea level.
It is an imaginary line that demarcates the earth’s atmosphere from space.
A record-keeping body called Fédération Aéronautique Internationale (FAI) established this boundary in the 1960s.
Any individual who crosses this line qualifies to be an astronaut.
The line does not indicate much physical variations within a short distance on either side of the line:
There is no significant difference in the pressure or the composition of air.
The earth’s gravity continues to exert its pull here.
The atmosphere doesn’t end here.
However, Karman line is significant as it regulates airspace:
It marks the altitude beyond which a traditional aircraft cannot fly.
It also acts as a legal reference that separates airspace that a country can claim to own from space itself, which is governed like international waters.
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