Finally, after they have been predicted a 100 years ago by Albert Einstein's general relativity theory and shortly before by Henri Poincaré, two scientific collaborations (LIGO and VIRGO) have measured the echo of gravitational waves, which were emitted by the merger of two massive black holes.

The experiment is not only a milestone in astronomy, allowing for the deeper understanding of the universe, but has inspired a lot of experiments worldwide due to the immense accuracy that had to be achieved. Thus, not surprisingly, they are on the top of the list for the next Nobel Prize.

The original paper appeared yesterday in the leading physics journal Physical Review Letters ( simultaneously to press conferences worldwide.