According to Einstein's theory of general relativity, mass curves spacetime. When the distribution of mass changes, the curvature must also change and that change spreads outwards through space like the ripples on a pond. These ripples, also called gravitational waves, are very faint. Only the most catastrophic events and massive objects in the universe are capable of producing gravitational waves of measurable strength.
LIGO (the Laser Interferometer Gravitational-wave Observitory) consists of detectors in Hanford, WA and Livingston, LA built to find gravitational waves. LIGO has just undergone a series of upgrades that will eventually increase its sensitivity by a factor of 10 and greatly increase the volume of space it can search. Once these elusive spacetime ripples are caught, they will reveal important information about their sources. With gravitational waves it will be possible to watch neutron stars and black holes collide, see into the heart of a supernova, and look back to the moment of the universe's creation.
The Andrews University Gravitational Wave Group (AUGWG) members are members of the LIGO Scientific Collaboration (LSC), an international group including hundreds of physisicts who work on LIGO science. Currently, the AUGWG is involved in efforts to characterize detector performance, extract signals from multi-detector data and determine what information is carried by a gravitational wave.