Max-Planck-Institute for Radio Astronomy

Auf dem Hügel 69
D-53121 Bonn - Endenich

Research Departments

Radio astronomical measurements allow the study of a variety of questions in fundamental physics. Those questions range from the equation-of-state of super-dense matter to the investigation of fundamental forces such as gravity and magnetism.

The research team uses the millimetre- and sub-millimetre range of the electromagnetic spectrum to observe various phenomena in the universe. The cosmic background radiation is also being investigated, as well as molecular clouds in the Milky Way and other galaxies.

By employing radio-interferometry, extragalactic objects and their centres are investigated in great detail. The Very Long Base Line Interferometry (VLBI) method is applied by correlating data from telescopes distributed worldwide and using them as a “giant“ combined telescope within the framework of coordinated arrays as the the European VLBI network (EVN). In addition, global VLBI experiments are conducted in cooperation with telescopes in the USA.


Research News

Einstein wins again

December 13, 2021

An international team of researchers from ten countries led by Michael Kramer from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has conducted a 16-year long experiment to challenge Einstein’s theory of general relativity with some ...

The European Pulsar Timing Array collaboration reports on the outcome of a 24 year observing campaign with five large-aperture radio telescopes in Europe, resulting in a candidate signal for the since-long sought gravitational wave background due to ...


Since mid-December 2021, a new plaque can be seen on the outside wall of the Mannheim Planetarium, identifying the building as an outpost of the Milky Way Trail at the Effelsberg radio telescope, namely the galaxy NGC 205.

The Milky Way Trail is one ...

An international team of astronomers has utilized the South African MeerKAT radio telescope to discover a mysterious chain of hydrogen gas clouds the size of a massive galaxy. The accumulation of so much elemental hydrogen without associated stellar ...

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