Question

Continue to scroll up through the atmosphere.

What phenomenon occurs at 51.5 miles above sea level?

Answer 1

At an altitude of 51.5 miles (approximately 82.8 kilometers) above sea level, you would be entering the Kármán line, which is often cited as the boundary between Earth's atmosphere and outer space. At this altitude, atmospheric pressure is extremely low and the air is very thin, making conventional atmospheric flight impossible.

In addition to this, you would experience a phenomenon known as the "edge of space," where the sky transitions from blue to black, and you might begin to see the curvature of the Earth. This altitude is also where cosmic radiation becomes more significant, as the protective layer of the atmosphere is much thinner.

If you were fortunate enough to observe the view, you would see the Earth in a way that few get to experience, potentially with a clear perspective of the planet's curvature against the backdrop of the vastness of space.