lähdänopeus
Lähdönopeus, also known as escape velocity, is the minimum speed an object must attain to break free from the gravitational pull of a celestial body, such as a planet or moon, without further propulsion. It is a fundamental concept in orbital mechanics and astrophysics.
The formula for escape velocity is derived from the principle of conservation of energy. An object needs
The escape velocity depends on the mass of the celestial body and the distance from its center.
For Earth, the escape velocity at the surface is approximately 11.2 kilometers per second (about 25,000 miles