Concept
Escape Velocity
The minimum speed to leave a body's gravity for good.
The speed at which the kinetic energy of an object equals its gravitational binding energy. From Earth's surface, it is ~11.2 km/s.
Overview
The speed at which the kinetic energy of an object equals its gravitational binding energy. From Earth's surface, it is ~11.2 km/s.
See also
Hill Sphere
The volume in which a body's gravity dominates.
Black Holes
Regions where gravity stops light itself.
Lagrange Points
Five spots where gravity and orbital motion balance.
Accelerating Universe
Cosmic expansion is speeding up, not slowing.
Parabolic Trajectory
The borderline trajectory at exactly escape speed.
The Big Bang
How everything began, 13.8 billion years ago.