The Schwarzschild solution describes spacetime in the vicinity of a non-rotating massive spherically-symmetric object. Of the solutions to the Einstein field equations, it is considered by some to be one of the simplest and most useful.
== Assumptions and notation ==
Working in a coordinate chart with coordinates
(
r
,
θ
,
ϕ
,
t
)
{\displaystyle \left(r,\theta ,\phi ,t\right)}
labelled 1 to 4 respectively, we begin with...