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Gravitational Waves

Ripples in space-time created by the stretching and squeezing effects of massive objects, notably supernovae, binary black holes, and binary neutron stars. Gravity waves are transverse waves, meaning that they stretch and squeeze space-time in directions perpendicular to the wave’s motion. Einstein’s Theory of General Relativity predicts the existence of gravity waves, but they have not yet been detected.

Radio Programs

LIGO II Listening for black holes February 20, 2019

LIGO Whipping up space and time February 19, 2019

Making a Black Hole Making a little black hole September 14, 2018

Building Big Black Holes Building bigger black holes June 26, 2018

Pulsars III Timing ripples in space and time November 29, 2017

New Missions Stars and ripples for two spacecraft December 19, 2016

Dark Alternatives New light on dark matter August 29, 2016

Black Hole Ripples Explaining ripples in the universe June 30, 2016

Gamma-Ray Bursts II A final gasp from dead stars April 19, 2016

Merging Quasars Pairs of black holes get closer December 16, 2015

Featured Images

Rippling Through Space February 19, 2019

Artist's concept of two neutron stars merging to make a black hole

Violent Merger September 14, 2018

Computer simulation of merging black holes

Dark Ripples June 30, 2016

Launch of Lisa Pathfinder

Gravity Bound December 2, 2015