London: A catastrophic collision with a neighbouring galaxy in two billion years’ time could wake up Milky Way galaxy’s dormant black hole, and send our solar system hurtling into space, scientists say. Researchers led by astrophysicists at Durham University in the UK predict that the Large Magellanic Cloud (LMC) could hit the Milky Way in two billion years’ time. The collision could occur much earlier than the predicted impact between the Milky Way and another neighbouring galaxy, Andromeda, which scientists say will hit our galaxy in eight billion years.
As it feeds, the now-active black hole would throw out high-energy radiation and while these cosmic fireworks are unlikely to affect life on Earth, the scientists say there is a small chance that the initial collision could send our solar system hurtling into space. Galaxies like our own Milky Way are surrounded by a group of smaller satellite galaxies that orbit around them, in a similar way to how bees move around a hive.
The Large Magellanic Cloud is the brightest satellite galaxy of the Milky Way and only entered our neighbourhood about 1.5 billion years ago. It sits about 163,000 light years from the Milky Way. “The destruction of the Large Magellanic Cloud, as it is devoured by the Milky Way, will wreak havoc with our galaxy, waking up the black hole that lives at its centre and turning our galaxy into an ‘active galactic nucleus’ or quasar,” said Cautun. “This phenomenon will generate powerful jets of high energy radiation emanating from just outside the black hole,” he said.
“While this will not affect our Solar System, there is a small chance that we might not escape unscathed from the collision between the two galaxies which could knock us out of the Milky Way and into interstellar space,” he added.
