Editing Space (section)

=== Einstein ===
[[File:Albert Einstein 1947.jpg|right|upright|thumb|[[Albert Einstein]]]]
In 1905, [[Albert Einstein]] published his [[special theory of relativity]], which led to the concept that space and time can be viewed as a single construct known as ''[[spacetime]]''. In this theory, the [[speed of light]] in [[vacuum]] is the same for all observers—which has [[relativity of simultaneity|the result]] that two events that appear simultaneous to one particular observer will not be simultaneous to another observer if the observers are moving with respect to one another. Moreover, an observer will measure a moving clock to [[time dilation|tick more slowly]] than one that is stationary with respect to them; and objects are measured [[length contraction|to be shortened]] in the direction that they are moving with respect to the observer.

Subsequently, Einstein worked on a [[general theory of relativity]], which is a theory of how [[gravity]] interacts with spacetime. Instead of viewing gravity as a [[Force field (physics)|force field]] acting in spacetime, Einstein suggested that it modifies the geometric structure of spacetime itself.<ref>Sklar, L. ''Philosophy of Physics''. p. 43.</ref> According to the general theory, time [[gravitational time dilation|goes more slowly]] at places with lower gravitational potentials and rays of light bend in the presence of a gravitational field. Scientists have studied the behaviour of [[binary pulsar]]s, confirming the predictions of Einstein's theories.{{Citation needed|date=December 2024}} Non-Euclidean geometry is usually used to describe spacetime.{{Citation needed|date=December 2024}}