Relative time travelers

[Outbelow]

Does the milky way's supermassive black hole effect time towards us and what theories can prove this?

Is there a theory or equation that shows that our time is being affected by the black hole?

[andrew s]

Theoretically yes but we are so far way other sources of gravitation dominate in our region e.g. the Sun and the Earth. Even then the effects are small. The GPS system makes correction for both the relative velocity of the satellites and their local gravitational field relative to the ground. 

Time is a tricky thing in General Relativity and is a parameter that can be chosen in different ways depending on the coordinate system chosen and who is doing the observing from where.

Regards Andrew 

[Outbelow]

is there any other theory other than general relativity?

 

[andrew s]

Not that I am aware off. There are MOND type theories but they are aimed at getting  away from Darl Matter.

Regards Andrew 

[Outbelow]

Thank you.