A plane of points with equal gravitational potential, the work done travelling on an equipotential is zero
Geostationary orbit
An orbit with a time period of one day and stay over one point on the earths surface, they are directly above the equator and travel in the same direction as the earths rotation
Gravitational field
A region of space where objects with mass experience an attractive force due to gravity
Gravitational field strength
The gravitational force on an object divided by its mass, it is the acceleration due to the gravitational field
Low orbit
An orbit with a height between 160Km and 2000Km
Newtons law of gravitation
Force of gravity is proportional to the product of the masses involved and inversely proportional to the squareseparation of the masses
Synchronous orbits
A orbit with a time period of one day so will return to the same point in the sky each day
