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The speed of light in a locale is always equal to c according to the observer who is there. That is, every infinitesimal region of spacetime may be assigned its own proper time, and the speed of light according to the proper time at that region is always c. This is the case whether or not a given region is occupied by an observer.
The faster the relative velocity, the greater the time dilation between them, with time slowing to a stop as one clock approaches the speed of light (299,792,458 m/s). In theory, time dilation would make it possible for passengers in a fast-moving vehicle to advance into the future in a short period of their own time.
In Speed and Politics, Virilio coined the term dromology to describe the study of "speed-space". Virilio describes velocity as the hidden factor in wealth and power, where historical eras and political events are effectively speed-ratios. In his view, acceleration destroys space and compresses time in ways of perceiving reality.
Researchers have discovered that Mars’s rotation is speeding up. Here's what's happening.
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Time's Paces is a poem about the apparent speeding up of time as one gets older. It was written by Henry Twells (1823–1900) and published in his book Hymns and Other Stray Verses (1901). The poem was popularised by Guy Pentreath (1902–1985) in an amended version.
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The timeline in this schematic diagram extends from the Big Bang/inflation era 13.8 billion years ago to the present cosmological time. Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously increasing with time.