Still images of black holes have stunned the world before, but astronomers are now attempting something even more ambitious: capturing the first-ever video of a black hole in action.
Using radio telescopes positioned all over the globe, scientists are training their instruments on Messier 87, a galaxy roughly 50 million light-years from Earth, to record the dynamic, swirling activity around its supermassive black hole. Bob McDonald, host of CBC's beloved science program Quirks and Quarks, broke down what this historic effort could reveal.
How Do You Film Something That Swallows Light?
Black holes don't emit light. They consume it. But the superheated gas and matter swirling around them in what's called an accretion disk glows intensely, and that's what astronomers can observe. By coordinating radio telescopes spread across continents into a single planet-sized virtual instrument, researchers can resolve fine details at the centre of distant galaxies with extraordinary precision.
This technique, known as very-long-baseline interferometry (VLBI), is the same approach used to produce the first-ever image of a black hole in 2019, also of Messier 87. That image was a snapshot. Now, the goal is a movie.
What Scientists Hope to See
A video, even a slow-motion one built from multiple observations over time, would let astronomers study how matter falls into the black hole, how powerful jets of energy are launched from its poles, and how the surrounding magnetic fields behave. These are among the most extreme physical processes in the universe, and understanding them could deepen our grasp of fundamental physics.
M87's central black hole is a colossus, estimated at 6.5 billion times the mass of our Sun. Watching it "breathe" in near-real time would be an unprecedented scientific achievement.
Why It Captures the Imagination
Black holes occupy a special place in both science and popular culture, representing the ultimate cosmic unknown. For science communicators like Bob McDonald, projects like this are a chance to remind us all that the universe is far stranger and more wondrous than anything we could invent.
Source: CBC Technology / Quirks and Quarks
