A Galaxy Crashes at 2 Million MPH, Creating One of the Most Powerful Shock Waves Ever Seen The Daily Galaxy --Great Discoveries Channel2-million-mile-per-hour galactic crash reawakens a dangerous 'cosmic crossroads' Yahoo! VoicesAstronomers spot 1 of the most powerful 'sonic booms' in the universe as massive galaxy crashes into its neighbors Livescience.comWEAVE spectrograph uncovers dual nature of galaxy shock Phys.orgTwo million mph violent galaxy collision in space ...Tech and Science Daily podcast Evening Standard