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

Distances in the universe are incredibly huge, so that even the great speed at wich stars move around the galaxy is extremely slow in comparision.

One “galactic year” is 230 million earth years. The last time the sun was in this position was before the first dinosaurs.

Those 5000 years humans have mapped stars are just the blink of an eye on that timescale. Stars changed positions, but not noticable for us.