For the first time in history, scientists have successfully detected the sound of gravitational waves.
In short: In 2023, researchers achieved a landmark breakthrough by capturing the elusive sound of gravitational waves. Cosmologist Tessa Baker, a leading expert in the field, explains how these ripples in spacetime are detected and what they reveal about the fundamental laws that govern the structure and evolution of our vast universe.
Gravitational waves are essentially ripples in the fabric of spacetime, caused by some of the most violent and energetic processes in the cosmos. Detecting them is a monumental task that requires highly sensitive equipment. In May 2023, cosmologist and astronomer Tessa Baker presented a talk at the Royal Institution detailing how these signals are identified and what they mean for our understanding of gravity. Baker, who is a Reader at Queen Mary University of London and a Royal Society University Research Fellow, has dedicated her career to investigating how gravity shapes the universe.
To test her theories, Baker collaborates with several major international experiments. These include ground-based detectors like the LIGO-Virgo-KAGRA network, as well as space-based initiatives such as the LISA satellite mission and the Vera C. Rubin Observatory. These instruments act as cosmic ears, listening for the faint, characteristic vibrations emitted when massive objects, such as black holes or neutron stars, collide or merge. The ability to detect these waves provides a new way to observe the universe, moving beyond traditional light-based astronomy to a more direct measurement of gravitational phenomena.
The research conducted by Baker and her colleagues is part of a broader effort to refine our knowledge of gravity. Having completed her training at the University of Oxford and held positions in cities including Philadelphia, Boston, New York, and Sydney, Baker established her own research group at Queen Mary University of London in 2019. Her work is central to the Astronomy Unit's public engagement program, which aims to share complex astronomical findings with a wider audience. By studying these waves, scientists hope to uncover deeper insights into the nature of spacetime itself, potentially challenging or confirming existing physical laws.
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- Summary by Intellect · source: What do gravitational waves sound like? - with Tessa Baker
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