In a statement from US Aerospace and Aviation Agency (NASA), Chandra X-ray Observatory, vast area infrared Observation Explorer wise, and telescope in Arizona were observed by 5 pairs of black hole.
The statement was emphasized that masses of 5 pairs of black hole were millions of times size of sun.
The discovered black holes are expected to give astronomers insight into how large-scale mass movements called "Gravity waves" created vibrations in universe's Uzam-time tissue.
The largest of black holes, supermassive, is assumed to be in center of almost all galaxies.