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johne1618
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As an observer who is simply traveling with the Hubble flow is my proper time the same as the cosmological time or is it equal to the conformal time?
mfb said:If you are at rest relative to the CMB, otherwise you will get a different value. For typical velocities relative to the CMB (just the motion of galaxies, not relativistic spacecraft s), the difference is very small compared with the current timing uncertainties.
Proper time is the time measured by a clock that is at rest relative to the observer. It is the time experienced by an object or observer in its own frame of reference.
Cosmological time is a measure of time that is based on the expansion of the universe. It takes into account the effects of the expansion on the measurement of time.
Conformal time is a measure of time that is used in cosmology to describe the evolution of the universe. It is based on the concept of conformal mapping, which preserves the angles between objects but not their distances.
No, proper time and cosmological time are not the same. Proper time is measured by an observer at rest, while cosmological time takes into account the effects of the expansion of the universe.
No, proper time and conformal time are not the same. While proper time is based on the observer's frame of reference, conformal time takes into account the effects of the expansion of the universe and is used in cosmology to describe the evolution of the universe.