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  2. World line - Wikipedia

    en.wikipedia.org/wiki/World_line

    A world line is a special type of curve in spacetime. Below an equivalent definition will be explained: A world line is either a time-like or a null curve in spacetime. Each point of a world line is an event that can be labeled with the time and the spatial position of the object at that time.

  3. Absolute space and time - Wikipedia

    en.wikipedia.org/wiki/Absolute_space_and_time

    The laws of physics transform from one inertial frame to another according to Galilean relativity, leading to the following objections to absolute space, as outlined by Milutin Blagojević: [10] The existence of absolute space contradicts the internal logic of classical mechanics since, according to Galilean principle of relativity, none of the ...

  4. Event (relativity) - Wikipedia

    en.wikipedia.org/wiki/Event_(relativity)

    An event in the universe is caused by the set of events in its causal past. An event contributes to the occurrence of events in its causal future. Upon choosing a frame of reference, one can assign coordinates to the event: three spatial coordinates x → = ( x , y , z ) {\displaystyle {\vec {x}}=(x,y,z)} to describe the location and one time ...

  5. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    In inflationary models of cosmology, times before the end of inflation (roughly 10 −32 seconds after the Big Bang) do not follow the same timeline as in traditional Big Bang cosmology. Models that aim to describe the universe and physics during the Planck epoch are generally speculative and fall under the umbrella of "New Physics".

  6. Steady-state model - Wikipedia

    en.wikipedia.org/wiki/Steady-state_model

    One of the fundamental assumptions of the steady-state model is the cosmological principle, which follows from the perfect cosmological principle and which states that our observational location in the universe is not unusual or special; on a large-enough scale, the universe looks the same in all directions and from every location (homogeneity ...

  7. Timeline of fundamental physics discoveries - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_fundamental...

    This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics. Such discoveries are often a multi-step, multi-person process.

  8. Multiverse - Wikipedia

    en.wikipedia.org/wiki/Multiverse

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 December 2024. Hypothetical group of multiple universes Not to be confused with Metaverse. "Multiverses" redirects here. For the crossover fighting game, see MultiVersus. For other uses, see Multiverse (disambiguation). Part of a series on Physical cosmology Big Bang · Universe Age of the universe ...

  9. Closed timelike curve - Wikipedia

    en.wikipedia.org/wiki/Closed_timelike_curve

    If the object were in free fall, it would travel up the t-axis; if it accelerates, it moves across the x axis as well. The actual path an object takes through spacetime, as opposed to the ones it could take, is known as the worldline. Another definition is that the light cone represents all possible worldlines.