Final answer:
A gravitational field surrounds any object with mass, representing the gravitational force on another mass within its influence, with the force magnitude described by the equation mg.
Step-by-step explanation:
A gravitational field surrounds anything that has mass. This field represents the gravitational force that would act on any other mass placed within its influence. According to Enduring Understanding 2.B, the gravitational field is a vector directed toward the center of the mass creating it. Moreover, Essential Knowledge 2.B.1 explains that a gravitational field g at the location of an object with mass m causes a gravitational force of magnitude mg to be exerted on the object in the direction of the field. This concept is crucial to understanding how objects in the universe interact with each other without coming into physical contact, essentially supporting Big Idea 3 that the interactions of an object with other objects can be described by forces.