Hacker News Reader

Hmm.

Given that its distance was more than likely measured by the light, I would assume that 12 billion light-years was the distance when the light was emitted; not its current distance.

So, correct me if I'm wrong, that renders your whole point about Hubble expansion moot, no?

View on HN

Nope. If the quasar were 12 billion light-years away when the light was emitted, the light would never have even reached us! In this scenario, the distance between the quasar and Earth that the light needs to traverse would undergo metric expansion that would hugely outpace any progress made by the light's motion (more precisely, its peculiar motion) in the direction of Earth.

Reply on news.ycombinator.com