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

Because the last time we were in this point in our orbit around the galaxy (a galactic year, if you will), dinosaurs were still around.

Moreover, you can’t see a single star in the sky with the naked eye that is more than 300 light years away. Considering that the galaxy is over 200,000 light years across, that’s a tiny sphere of stars that are all travelling together. Here’s an artist’s rendering of that scale:

https://images.app.goo.gl/V32N9eS6Ly9VEBih9