Scientists have used theloudest gravitational wave signal ever recorded to put Albert Einstein’s century-old theory of general relativity to its toughest test yet. This extraordinary signal, known as ...

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

Recent observations suggest that 'runaway' black holes are tumbling through the cosmos. Building on decades of theory, the discovery adds a remarkable new chapter to the story of the universe.