Video

Where Does Space Actually Start?

The Fédération Aéronautique Internationale has demarcated the Karman Line - which lies at an altitude of 100 kilometers (330,000 feet; 62 miles) above the Earth's sea level - as the boundary where space begins. But, NASA spokesperson Dan Huot explains from a physical science’s perspective that “there is no hard-definable point where space begins; the atmosphere just gradually decreases the higher you get.”

The Fédération Aéronautique Internationale has demarcated the Karman Line – which lies at an altitude of 100 kilometers (330,000 feet; 62 miles) above the Earth’s sea level – as the boundary where space begins. But, NASA spokesperson Dan Huot explains from a physical science’s perspective that “there is no hard-definable point where space begins; the atmosphere just gradually decreases the higher you get.” So, where does space actually start? Watch Seeker explains in the video.

6 comments

  1. Space will always be a mystery to me. With only dust and gases out there, and heat radiating from low-gravity planets and moons, you’d think it would be hot out there – instead, you’d freeze.

    1. Ebullism – the formation of bubbles in body fluids due to reduced ambient pressure – is the worse I can imagine. I also read space is extremely cold, but instant freezing wouldn’t happen because the vacuum would cause heat to transfer away from the body very slowly. Death would be extremely painful.

What Do You Think?