To accurately model the universe, we need large surveys of its content and behavior. But how can we be sure that our surveys are a representative snapshot of the universe as a whole? In this post we tackle the problem of cosmic variance.
Does the existence of mysterious, ultra-luminous X-ray sources indicate that black holes may become more massive than previously thought?
Tight relationships between galactic properties seem to depend on environment.
Two upcoming space telescope missions, WFIRST and Euclid, will be able to shed light on the nature of the mysterious dark energy.
How do we locate galaxy clusters in the sky? We’ll examine the red sequence method in particular.