Gravitational waves from a binary black hole merger observed by LIGO and Virgo

27 September 2017 Astronomy Now

The LIGO Scientific Collaboration and the Virgo collaboration report the first joint detection of gravitational waves with both the LIGO and Virgo detectors. This is the fourth announced detection of a binary black hole system and the first significant gravitational-wave signal recorded by the Virgo detector, and highlights the scientific potential of a three-detector network of gravitational-wave detectors.


Black holes crash together and make waves

3 June 2017 William Harwood

Three billion years ago, in a third of a second, two black holes crashed into each other and merged into a single entity, converting two solar masses into energy that shook the fabric of spacetime, sending gravitational ripples across the universe that were detected on Earth last January, researchers announced Thursday.


Gravitational wave testbed repurposed as comet dust detector

26 April 2017 Stephen Clark

In the final months of Europe’s LISA Pathfinder mission, scientists have found an unexpected use for the trailblazing testbed for a future gravitational wave observatory by tracking the tiny dings made by microscopic particles that strike the spacecraft in deep space, exploiting the impacts to learn about the population of dust grains cast off by comets and asteroids across the solar system.


LIGO resumes search for gravitational waves

1 December 2016 Astronomy Now

After a series of upgrades, the twin detectors of LIGO, the Laser Interferometer Gravitational-wave Observatory, have turned back on and resumed their search for ripples in the fabric of space and time known as gravitational waves. Now boasting a 25 percent improvement in sensitivity, LIGO recommenced science observations at 4pm GMT on 30 November.