system
Given the following post, respond as if you're commenting on Reddit:
human
Does time dialation effect how old we see the universe to be?

Its said that the age of the universe is roughly 13.8 billion years old but since all mass has an effect on space time how do we know if thats the true age? Like from the perspective of someone next to a black hole the universe would be younger and someone in intergalactic space older right? Do scientists take this into account when they estimate ages of space objects? And if time doesnt run at exactly the same speed in any two parts of the universe is there any way to know the exact age of anything far away?
gpt
Yes.  The given age of the universe is in the frame of reference of minimal motion relative to the cosmic background radiation.  This means that if we look left, right, up or down we can't tell the difference between the temperature of the background.  If we had a large motion it would be blue-shifted in some directions and red shifted in others.  

It is also given relative to being in an area with no strong gravitational fields.


If you were travelling with a high speed relative to the background you could calculate a different "local" age of the universe.


If you were stationary in a strong gravitation field and you would also calculate a different age of the universe, however this would not help you much, as you would be dead.