Max Planck Institute for Radio Astronomy

Max­Planck­Research Magazine

Issue 2013

MaxPlanckResearch 4/2013

How Cosmic Clocks Tick
Pulsars are the most compact material objects in the universe. Their diameter is approximately equal to that of the city of Munich, but they contain the mass of the Sun. These extreme conditions make them ideal test objects for the theory of general relativity, as the work of Michael Kramer and his colleagues from the Bonn-based Max Planck Institute for Radio Astronomy shows.

MaxPlanckResearch 1/2013

Star Factories at the End of the World
When the universe came into being 13.7 billion years ago, there was initially only
radiation. A few hundred million years later, however, the space was filled with galaxies –
tremendously productive star factories that don’t fit quite so well with the image of a
gradual cosmic evolution. Researchers like Fabian Walter from the Max Planck Institute
for Astronomy in Heidelberg are attempting to illuminate a dark epoch of the universe.
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