Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously ...

When you gaze up at the night sky, it’s easy to feel as though you’re looking into an endless, empty canvas sprinkled with distant, tiny lights. Our solar system feels vast, our galaxy immense. But ...

This video explores one of the most unsettling ideas in modern cosmology: most of the universe appears to be made of ...

Supermassive black holes are the largest known black holes in the universe, sitting at the center of most large galaxies. They are sometimes described as cosmic monsters because they feed on ...

The Universe’s biggest black holes may not be born giants after all. Scientists analyzing gravitational-wave signals from dozens of black hole collisions found evidence that the heaviest black holes ...

Our universe appears flat—but this observation still leaves plenty of options for its true shape. In fact, our cosmos could resemble a donut What shape is the universe? This question is far more ...