Black holes' shadows could reveal if Einstein's general relativity holds
A team of scientists has come up with a clever way to check if Einstein's general relativity really holds up, by simulating and studying the shadows cast by black holes.
Using 3D models, they compared these "cosmic silhouettes" to what different gravity theories predict.
So far, so good for general relativity
So far, yes—real black hole images (like the famous M87 photo from 2019) look just like what Einstein's math says they should. That's a big point for general relativity.
But current telescopes can't quite spot all the tiny differences that might show if another theory works better.
What's next for the team?
The team is planning upgrades for their telescope setup, hoping for much clearer images soon.
With better tech, they'll be able to tell gravity theories apart more easily—and maybe even uncover new secrets about how our universe works at its wildest edges.