Comets and planets
Stars & Star Clusters
Stellar coronas, clusters of stars and hot gas produced by outflow from young stars.
Dwarfs & Planetary Nebulas
Hot gas associated with the final stages of evolution of Sun-like stars, novas, and other white dwarfs in binary star systems.
& Supernova Remnants
X-ray sources produced by the violent explosions of massive stars.
Hot, isolated neutron stars, rotation-powered pulsars, and neutron stars accreting matter from a nearby companion star.
Stellar black holes, mid-mass black holes, and supermassive black holes.
Images related to the Galactic Center and other features of the structure and evolution of the Milky Way Galaxy.
Galaxies & Starburst Galaxies
Images of spiral, elliptical, and irregular galaxies that show X-ray sources associated with collapsed stars and star formation.
& Active Galaxies
Galaxies with unusually energetic activity, including high-energy jets, that is related to a central supermassive black hole.
& Clusters of Galaxies
Vast clouds of hot gas embedded with numerous galaxies.
The sky as observed in X-rays is not dark, but gives off a glow thought to be from many distant sources. Deep surveys with the Chandra X-ray Observatory should reveal the cause of this glow.
Objects that don't fit in the above categories, such as brown dwarfs & gamma-ray bursts.
Text version of complete category list