What is the term abbreviated as EV that refers to the speed needed to break the orbit of a celestial body?

Escape velocity is the term that describes the minimum speed needed for an object to break free from the gravitational attraction of a celestial body, such as a planet or moon, without any additional propulsion. This velocity is critical in astrophysics and space exploration because it determines how fast a spacecraft must travel to leave a celestial body's gravitational pull.

To calculate escape velocity, one must consider the mass of the celestial body and the distance from its center to the point of escape. For instance, the escape velocity from the surface of the Earth is approximately 11.2 kilometers per second. This concept is foundational in understanding how spacecraft are launched into space, as it ensures they can overcome gravitational forces and enter orbit or travel into deep space. Other terms listed, like expedited velocity, exponential velocity, and evolutionary velocity, do not pertain to this specific phenomenon and their definitions relate to different contexts, such as speed variations in different scenarios or biological processes.