The black hole at the center of our galaxy has been compared to a doughnut — and as it turns out, this doughnut has swirls. Scientists shared a mesmerizing new image on Wednesday, showing Sagittarius ...

For more than 150 years, the OJ 287 galaxy and its brightness variations five billion light years away has both puzzled and fascinated astronomers, because they suspect two supermassive black holes ...

The anniversary show at the International Center of Photography, with 170 pictures, demonstrates how the camera can illuminate, persuade and puzzle. By Arthur Lubow To celebrate its 50th anniversary, ...