Quasars
A) are weak sources of light and radio waves.
B) are large in view of the energy they emit.
C) show relatively small red shifts, which suggests they are not far away.
D) seem to have massive black holes at their centers.

Question

Quizplus · Accepted Answer

Quasars are known to have massive black holes at their centers, with the energy emission coming from the accretion discs surrounding them. They are also large and extremely bright, making them easily visible from great distances. Their redshift values suggest they are very far from us.