Irish Independent

Revealed: Black hole at centre of Milky Way

- Ryan Hooper

NEVER-before-seen images offer fresh evidence that a supermassi­ve black hole lurks at the centre of the Milky Way.

The astronomic­al phenomenon – a larger version of the black holes which form when the centres of giant stars collapse in upon themselves – is widely regarded to reside at the centre of our galaxy.

However, scientists have long struggled to explain how the supermassi­ve versions, which are 10 billion times bigger than the Sun, are formed.

New pictures from the European Southern Observator­y (ESO) show clumps of gas swirling around at about 30pc of the speed of light on a circular orbit just outside its event horizon, the boundary marking its limits.

It is the first time material has been observed orbiting close to the point of no return, and the most detailed observatio­ns yet of material orbiting this close to a black hole, scientists say.

Specialist equipment was used to take a close look at the infrared radiation coming from the accretion disc around Sagittariu­s A*, the massive object at the heart of the Milky Way.

The ESO said the observed flares provide long-awaited confirmati­on the object is indeed a supermassi­ve black hole.

Reinhard Genzel, of the Max Planck Institute for Extraterre­strial Physics in Germany, who led the study, said: “This always was one of our dream projects but we did not dare to hope that it would become possible so soon.”

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