2-million-mile-per-hour galactic crash reawakens a dangerous 'cosmic crossroads' 

 Astronomers have observed a galaxy ripping through galactic debris left by multiple collisions at a dangerous "cosmic crossroads" called Stephan's Quintet. 

https://cdn.mos.cms.futurecdn.net/MsF7Qmectwr4VSAynAjMz7.png

https://www.space.com/million-mph-galaxy-collision-stephans