Some quasars (quasi-stellar radio source) have the largest red shifts ever observed. If this phenomenon is due to cosmic expansion, what can you say about their distance? What can you say about the age of the quasar at the time the light we now see left the quasar compared to the age of the universe? Explain.

Answer 1

Largest redshift means that the source was traveling faster than any other objects (relative to our velocity now) that any other objects in the universe. That makes them among the oldest.

You cannot compare the quasar age relative to the age of the universe (about 15 billion years) without knowing how large the redshift is.