* Gravity: Earth's gravity constantly pulls objects towards its center. To escape this pull, an object needs to reach escape velocity, which is about 11.2 kilometers per second (7 miles per second) from Earth's surface.
* Cannonball's Limitation: Even the most powerful cannons of the past could not launch a cannonball with enough velocity to reach escape velocity. The cannonball would quickly slow down due to gravity and eventually fall back to Earth.
* Modern Technology: Modern rockets, with their powerful engines and multi-stage designs, can achieve the necessary escape velocity to send objects into space. They use fuel to continuously accelerate, overcoming gravity's pull.
In short, a cannonball doesn't reach outer space because it lacks the initial velocity to escape Earth's gravitational field.
