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: Very large [[object]]s such as [[moon]]s, [[planet]]s and [[star]]s are needed to make a noticeable '''gravitational field'''.
: The [[Gravitational Field Strength|'''gravitational field''' strength]] of a [[moon]], [[planet]] or [[star]] determines the [[weight]] of an [[object]] in that '''gravitational field'''.
==Key Stage 5==
===Meaning===
A '''gravitational field''' is the region around a [[massive]] [[object]] which will affect another [[object]] with [[mass]].
===About Gravitational Fields===
: The '''gravitational field''' cause by an [[object]] is represented by [[Field Line|field lines]].
: The [[Field Line|field lines]] for a [[Gravitational Field|gravitational field]] around a single [[object]] are generally [[Radial Field Line|radial]]. However, for very large [[sphere|spherical]] [[object]]s can be approximated as [[Uniform Field Line|uniform]] for small regions close to the surface of that [[object]]. This is due to the gradual curvature of [[object]]s with large [[radius]].