# Hawking radiation for an observer at infinity

As an external observer at infinity, I observe a star collapsing. But because the surface of the star will be infinitely redshifted, I will never see the formation of the black hole. For me, there will be always some matter outside, it never crosses the event horizon.

So, can I observe the Hawking radiation if I never observe the formation of the black hole ?

• If you were infinitely far from the star, wouldn't you have to wait an infinite time before you could see it? – RedGrittyBrick Feb 3 '16 at 11:00
• @RedGrittyBrick - the observer at infinity is a synonym for the asymptotically flat observer – Yukterez Oct 18 '18 at 17:56