When does the Sky become Space?

ShuttleIf we are flying higher and higher it is meant to fly with greater and greater speeds. A speed, above a certain altitude, could be bigger than the circular orbital speed at that altitude.

So, at that altitude, it is better to use spacecraft than aircraft. Theodore von Kármán was the first to calculate this altitude. The Kármán line, lies at an altitude of 100 kilometers (62 mi) above the Earth’s sea level, and represents the boundary between the Sky and Space.

Image Credit: NASA


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s