Surely the universe must contain many other sources of gravitational waves. (newscientist.com)
We believe that the universe does indeed contain very many sources of gravitational waves. (newscientist.com)
Although the VIRGO sensitivity is, for the time being, at a lower level of those of the LIGO interferometers, it is adequate for confirming a potential detection with LIGO and would allow locating sources of gravitational waves in the sky with greater accuracy. (interactions.org)