Where does space start? This is a question that was asked by many people in the earlier times and some kids. The answer may vary from one place to another but the answer is pretty simple.
Space, or the place where there is no air molecule or any atom present. The history goes back to the early 1900s were a Hungarian physicist, Theodore Von Kármán, roughly predicted or determined the boundary of space to be about 80 kilometres and this is what the boundary of space is considered but only for the American standards. The actual line of space, which is an imaginary line just to determine if an object has reached near-vacuum, is set to 100 Kilometers or about 60 miles above sea level. The official agreement to finalize this altitude was the international space treaty which was established by the Quoter space treaty and came into action by October 1967. This line 100 kilometres or 62 miles high that determines the beginning of space is known as the Kármán Line named after the Hungarian physicist, Theodore Von Kármán who we just heard about.
So, If a spacecraft or Launchcraft, or person reaches 80 Kilometers, He/she/it would be in space by the American standards but not in international standards. It would only follow if he/she/it is above 100 kilometres/ 63 miles.
Thank You for Reading!
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