Black Holes in Galactic Centers
Some holes power brilliant quasars; most seem to lie dormant in relatively quiet galaxies like our own. Understanding these massive objects will help reconstruct the early history of the universe
Cosmic Jets
The violent activity at the center of many galaxies is manifested in the production of narrow, focused streams of ionized gas. Some are a few light-years long; others are a million times longer
Rotation in High-Energy Astrophysics
What is the source of the energy of pulsars, quasars and other strange objects? It may be gravitational energy converted Into rotational energy as a large object contracts into a small one
The Origin of Galaxies
The size, shape and other properties of the observed galaxies are traced to slight density enhancements in the expanding primordial fireball. Enhancements of certain mass were favored over others