According to reports, five huge black holes have been revealed by astronomers. These black holes were covered by dust and gas, therefore were not observed. According to the discovery, universe may have millions more 'supermassive' black holes than were previously expected.

These huge black holes are strong cosmic 'drains' that suck material into a point of infinite density that is created from the compressed mass of hundreds of thousands to billions of suns. The presence of these huge black holes at the centre of five galaxies was revealed by high energy X-rays emitted from around these black holes.

The American space agency NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) orbiting observatory helped detect the black holes. The orbiting observatory was launched in 2012.

The space telescope has been created to receive very- high energy X-rays from distant objects. According to lead scientist George Lansbury, from the Centre for Extragalactic Astronomy at the University of Durham, they were aware about supermassive black holes that are not hidden by dust and gas; however, they were expecting that many more were yet to be revealed.

Lansbury added that with help of NuSTAR, they have clearly observed the huge hidden black holes. He added, "Although we have only detected five of these hidden supermassive black holes, when we extrapolate our results across the whole universe then the predicted numbers are huge and in agreement with what we would expect to see".

The findings were presented by the researchers at the Royal Astronomical Society's National Astronomy Meeting, in Llandudno, Wales.