2-million-mile-per-hour galactic crash reawakens a dangerous 'cosmic crossroads'
Space.com   a day ago
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2-million-mile-per-hour galactic crash reawakens a dangerous 'cosmic crossroads'  Space.comWEAVE's view of Stephan's Quintet (IMAGE)  EurekAlertAstronomers spot 1 of the most powerful 'sonic booms' in the universe as massive galaxy crashes into its...