eli5: If the sun revolves around the galaxy, why do we still see the same constellation that was discovered by the Romans (probably 1000s of years ago). surely they should have been scattered by now due to revolution of the sun combined with the revolution of the earth around with sun

Question

Thnx to all, for the answer. I had a good time discussing and clearing my doubt.

In: 179

Answer 1

As others mentioned the movement of stars around the galaxy just takes such a long time we only see it in the timescale of millions of years.

There are other effects that change the night sky.
Axial precession can be seen in the order of 100 years, with careful measurement.

Not so much the shape of the constellation but where the constellations are relative to the north, and which star is the north star also changes

https://en.m.wikipedia.org/wiki/Pole_star#Precession_of_the_equinoxes

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