Last year, for the first time, the world gazed in collective wonder at an actual direct image of a black hole’s shadow.

Now, looking back at earlier, more rudimentary images, scientists have found evidence that the ring around M87 has a wobble that makes it look as though it’s glittering.

Last year’s history-making image was a feat of hard work that pushed our observation technology to the limits. It was the culmination of years of effort and planning — but the final image was put together from only one week’s worth of observations, taken in 2017.