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Abstract: The first direct detection of a gravitational wave signal, achieved by LIGO in 2015, was a ground-breaking experimental success, confirming a 100-year-old prediction of General Relativity. What was, only 8 years ago, a discovery worthy of a Nobel Prize, has now become a routine detection. Since then, the observation of almost one hundred signals, originating from the mergers of compact objects such as black holes or neutron stars, has been confirmed by LIGO and Virgo, and the worldwide LIGO-Virgo-KAGRA network is currently undertaking a new observing campaign. Besides their intrinsic interest as direct probes of our understanding of gravity, gravitational waves offer new ways to observe the Universe, complementary to electromagnetic messengers. After a basic introduction to gravitational waves detectors and data analysis techniques, the seminar will review the most recent results and sketch the present and future status of the exciting field of gravitational citing field of gravitational astronomy.