A pair of stars orbiting one another has been found near the supermassive black hole Sagittarius A* using the European Southern Observatory’s Very Large Telescope (ESO’s VLT). Credit; ESO Directed by: ...

The double star system is called HD 135344 AB and it's about 440 light-years away from Earth. A and B are both young stars, ...

But in the past two decades, new types of black holes have been seen and astronomers are beginning to understand how they form. Called supermassive black holes, they have been found at the center of ...