Viewing a single comment thread. View all comments

TwentyninthDigitOfPi t1_j4ljh2a wrote

Reply to comment by chechomsky in How do we know that we are in a certain place inside our galaxy? and how do we know how big it is just by looking at the cross section we are in? by friday_panda

The parallax isn't from the solar system's rotation around the galaxy, it's from Earth's rotation around the sun.

27

[deleted] t1_j4mfxnt wrote

Yeah, you'd have to wait like 200 million years for any valuable parallax data from the Sun's orbit around the galaxy.

4

Colon t1_j4myfry wrote

sounds like ancient alien knowledge becomes more and more valuable as time goes on

1