We do measure differences in gravitational force on earth it is much weaker at the equator

well how do we stay stuck to the earth with the varying elavations?

sometimes clouds are covering it

if the clouds were not there then it would be visible

they have changed though

just very slowly

because light takes time to travel

Because the stars are millions of light years away obviously it will barely change because the light takes time to travel

yes but 5000 years ago we didnt have the technology to record the place where the stars were at

because it hasnt moved enough to notice a difference by just looking at it

with using modern telescope technology we could record it now and 5000 years from now we could see a measurable difference

using the telescopes