Virgo
Virgo is a gravitational wave detector located in Cascina, Italy, operated by the European Gravitational-Wave Observatory (EGO). As one of the primary instruments in the global network of gravitational wave observatories alongside LIGO’s facilities in the United States, Virgo uses laser interferometry to detect ripples in spacetime caused by violent cosmic events. The detector became operational in 2007 and has been integral to confirming and localizing gravitational wave sources since the first detection in 2015.
Detection Capabilities and Operation
The detector is sensitive to gravitational waves produced by merging neutron stars, colliding black holes, and other energetic astrophysical phenomena. Virgo employs a 3-kilometer Fabry-Pérot laser interferometer that measures minute distortions in spacetime by comparing the travel times of laser beams along perpendicular arms. Through coordinated observations with LIGO and other detectors in the global network, Virgo helps triangulate the locations of gravitational wave sources in the sky, enabling follow-up electromagnetic observations by other telescopes.
Scientific Contributions
Virgo’s data has contributed to discoveries including the first detection of gravitational waves from merging neutron stars in 2017, which produced electromagnetic counterparts observed across the spectrum. The detector has also participated in confirming the properties of numerous black hole mergers and has improved understanding of the mass distribution and formation mechanisms of compact objects in the universe. Ongoing upgrades to Virgo’s sensitivity continue to expand the volume of space it can survey and the diversity of events it can detect.
Source Notes
- 2026-04-14: Gravitational Wave Detection of Sub Solar Mass Object Primordial Black · ▶ source
- 2026-04-25: Google · ▶ source