Time & Universe: Relative Meaning & Age

[ubcstudent]

If time is relative then what does it mean when they say the universe is 13.75 billion year old?

 

[Drakkith]

I believe the universe is 13.7 billion years old as per a clock on Earth. A clock at rest with respect to the CMB and away from any major gravitational sources would be SLIGHTLY faster. About 10 years faster by my estimate.

 

[nasu]

If time is relative then what does it mean when they say the universe is 13.75 billion year old?

Same as when we say "my car is 10 years old".

 

[Myslius]

Drakkith, are you suggesting, that there is absolute space-time FOR? More or less equal to CMB?
(1 - sqrt(1 - (370/300000)^2)))*13.7*10^9
10419 years according to me.

 

[Drakkith]

An absolute frame? No. But there is a frame that is at rest with respect to the CMB.