Table of Contents
Does the expansion of space affect time?
Time is perfectly well defined in any restframe and will not be affected by the overall expansion of the Universe, at whatever rate. Our time does not slow down due to the expansion of the universe.
Is space relative to time?
The famous physicist Albert Einstein helped develop the idea of space-time as part of his theory of relativity. That’s because space and time are relative — they depend on an observer’s speed.
Does space expansion cause time dilation?
As the universe gets larger, cosmological objects, such as galaxies, move more rapidly away from each other in a process known as Hubble expansion. The Absolute Lorentz Transformation indicates that increased velocities induce directional time dilation.
What would happen if space and time expanded simultaneously?
If both space and time were to expand simultaneously everything would expand in proportion. Locally such an expansion would be very difficult to detect. However, light reaching us from very distant sources would be affected by the cosmological scale expansion during the time for the light to reach us.
How does the expansion of the universe relate to general relativity?
As an effect of general relativity, the expansion of the universe is different from the expansions and explosions seen in daily life. It is a property of the universe as a whole and occurs throughout the universe, rather than happening just to one part of the universe.
What is the definition of the universe expanding?
It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand “into” anything and does not require space to exist “outside” it. Technically, neither space nor objects in space move. Instead it is the metric governing the size and geometry of spacetime itself that changes in scale.
How does the size of spacetime change with speed?
Instead it is the metric (which governing the size and geometry of spacetime itself) that changes in scale. As the spatial part of the universe’s spacetime metric increases in scale, objects become more distant from one another at ever-increasing speeds.