PARIS: Astronomers have discovered six galaxies ensnared in the cosmic "spider's web" of a supermassive black hole soon after the Big Bang, according to research published Thursday that could help explain the development of these enigmatic monsters.

Black holes that emerged early in the history of the Universe are thought to have formed from the collapse of the first stars, but astronomers have puzzled over how they expanded into giants.

The newly discovered black hole - which dates from when the Universe was not even a billion years old - weighs in at one billion times the mass of our Sun and was spotted by the European Southern Observatory (ESO).

Scientists said the finding helps provide an explanation for how supermassive black holes such as the one at the centre of our Milky Way may have developed. This is because astronomers believe the filaments trapping the cluster of galaxies are carrying enough gas to "feed" the black hole, enabling it to grow.

"The cosmic web filaments are like spider's web threads," said Marco Mignoli, an astronomer at the National Institute for Astrophysics (INAF) in Bologna who led the research, which was published in the journal Astronomy & Astrophysics.