For decades, scientists have suspected that some quasars, which are regarded as some of the brightest objects in the universe, might actually conceal not one but two black holes locked in a ...

Last year, astronomers were fascinated by a runaway asteroid passing through our Solar System from somewhere far beyond. It was moving at around 68 kilometres per second, just over double Earth&rsquo ...

Runaway black holes have moved from theoretical oddity to observed reality, and the picture they paint is as unsettling as it is awe inspiring. Instead of sitting quietly at galactic centers, some of ...

A radio image of two black holes orbiting each other in Quasar OJ287. The light comes from the glowing gas surrounding the black holes and the particle jets being emitted. Valtonen, Mauri et al., The ...

Astronomers had long suspected that certain quasars—those brilliant, otherworldly light sources fueled by supermassive black holes—could harbor two black holes rather than one. That theory, long ...

1.3 billion years ago, two orbiting massive black holes, circling each other at 250 times a second, collided in a violent, ...