The paper "Escape Velocity and Orbital Energy" is a wonderful example of an astronomy assignment. Orbital energy can be defined as the “sum of potential energy and kinetic energy of an orbiting body per unit mass”. This means that orbital energy is the energy that is a combination of potential as well as kinetic energies of the orbiting body. This is calculated for the orbiting bodies traveling in space. When the orbits are circular in shape, the energy is exactly half of the total gravity at the orbit (NationMaster.com 2005). Orbital energy is there with all the orbiting bodies and it facilitates the orbiting bodies to continue their motion in the space. Escape velocity can be defined as a speed with the help of which an object can escape from a gravitational field. This happens when atmospheric friction is ignored by the object because of the speed it carries. Escape velocity can also be explained as a speed at which, the kinetic energy (the energy created because of movement) and the degree of gravitational potential become equivalent (Bate, et.al 1971). The phenomenon of escape velocity results in response to the case of conservation of energy in which, energy is preserved. Due to escape energy, an object is able to break away from the gravity and for this purpose, some amount of energy is required by the object with the help of which, it can escape (Bate, et.al 1971). Velocity is directional while escape velocity is non-directional. It is often called escape speed because of its being non-directional.