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More than 100 years ago, Albert Einstein calculated that space and time can wobble and vibrate like jelly. These vibrations, known as gravitational waves, are created when stars explode or black holes collide. After researchers first observed these gravitational waves in September 2015, almost a hundred such observations have been made to date. They provide unique insights into the dark universe and its secrets. [more]

Gravitational waves have been providing unique insights into black holes and neutron stars since 2015. Researchers are working intensively on the planning and construction of new detectors – not only on Earth, but also in space. The LISA satellite mission, an initiative of the European Space Agency with contributions from NASA, will be launched in just over 10 years and will measure gravitational waves that cannot be detected from Earth. [more]

An introduction to Einstein's (special) relativity theory with Axel Kleinschmidt [more]

Astronomy is a science as old as humanity – the view of the night sky has always fascinated us. We have developed increasingly sophisticated telescopes that allow us to observe the entire electromagnetic spectrum. But there are other sources of information from space! Particles come directly from the interior of stellar explosions, and waves in space-time – gravitational waves – have been detectable for several years. With all these different “messengers”, we are gaining a much more comprehensive picture of our universe – with the help of multi-messenger astronomy. [more]

A talk on neutron stars and black holes with Ludovica Crosato Menegazzi [more]

A few years ago, a new and exciting era in astronomy began. Since then, humanity has not only been able to see the cosmos, but also to hear it. [more]

Almost ten years ago, on September 14, 2015, a new era of astronomy began. Since then, we have been observing the Universe in a completely new way: with gravitational waves. [more]

For thousands of years, we have been looking at the Universe through our eyes. But over 99% of the Universe is dark and will never be observed with electromagnetic waves. Since September 14, 2015, everything has changed: gravitational waves have been discovered! [more]

On September 14, 2015, a gravitational wave was detected for the first time, originating from the merger of two black holes. Less than two years later, this great success was honored with a Nobel Prize. Since then, a lot has happened and the field of research continues to develop rapidly. [more]