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• Murmer of a Bang
  Two astronomers discover the remnant radiation from the Big Bang while trying to characterize the sources of noise in a radio antenna they wished to use for astronomical observations.
• Big Hiss Missed by Others
  The signature of the remnant radiation from the Big Bang could have been found by others, if they had known where to look, but Penzias and Wilson had just the right set of circumstances to make the discovery.
• Cosmic X-ray sources Found Outside the Galaxy
  Astronomers continue to look at the Universe in a different light, this time in the X-ray. This article discusses the discovery of two sources that shine in X-ray, both thought to lie beyond our Galaxy.
• Quasars: Express Trains to the Netherworld
  At the edge of the Universe, astronomers are finding objects called quasars, originally for the term quasi-stellar objects. The nature of quasars is unknown in 1965, but it is clear that they lie at large distances, and so must be very old.
• Galaxies Still Misbehaving
  Recent observations have made it clear that there is more matter contained in galaxies than astronomers can easily account for. This leads to the idea of dark matter.

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