Studying Quasars
The study of
high-redshift quasars allows astronomers to investigate questions of
1) Large scale structure of the universe
2) Early history of the universe
3) Galaxy evolution
4) Dark matter
Observing quasars at high redshifts
ó distances of several Gpc
ó Look-back times of many billions of years
ó Universe was only a
few billion years old!
