| The Space Shuttle travels hypersonically on its way into orbit, but relies on rockets, and punches through the atmosphere as quickly as possible. |
| The space shuttle is coasting from a very high speed and high altitude when it flies hypersonically. |
| The first shock wave is created as the air in the barrel is compressed by the front of the projectile as it travels hypersonically down the barrel. |
| If the gas is flowing hypersonically, it may also be the lowest temperature natural material in the universe, maybe. |
| Indeed, humans have been flying hypersonically for over four decades. |
