In August of 2007, astronomers located a gigantic hole in the universe. This empty space, stretching nearly a billion light-years across, is devoid of any matter such as galaxies, stars, and gas, and neither does it contain the strange and mysterious dark matter, which can be detected but not seen. The large void in the Constellation Eridanus appears to be improbable given current cosmological models. A radical and controversial theory proposes that it is a "universe-in-mass black hole"
The Milky Way is the galaxy that contains our solar system. This name derives from its appearance as a dim "milky" glowing band arching across the night sky, in which the naked eye cannot distinguish individual stars. The term "Milky Way" is a translation of the Classical Latin via lactea, from the Hellenistic Greek γαλαξίας κύκλος (pr. galaxías kýklos, "milky circle").
Starburst Cluster NGC 1929 in the Large Magellanic Cloud This cluster is creating shockwave “superbubbles” that are triggering chain reactions of supernova explosions. This image is a composite of three light wavelengths, X-rays are represented as blue, visible light as yellow, and infra-red light as red.