Reverberation mapping is a method that uses the time domain to probe size scales deep within the gravitational potential of the accreting supermassive black hole in the center of an active galactic ...

There's a universe full of black holes out there, spinning merrily away—some fast, others more slowly. A recent survey of ...

The Nature Index 2024 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...