A series of viral social media posts drew attention to an old cosmological theory-that our universe began from a collision between two separated universes-as a brand new scientific ...
The catastrophic collision of a black hole and a neutron star sent ripples across the universe. New analysis of those ripples could upend a major theory about how these extreme pairs form.
Just 25 light-years from Earth, astronomers have watched a planetary system tear itself apart in real time, catching the dusty aftermath of violent impacts that were once only theoretical. Instead of ...