Shockwaves of the submarine volcano in Tonga felt till Chennai

Shockwaves generated by Tonga volcano travelled at a speed of around 1,200 kmph to reach the skies of Chennai 10 hours after the event

NASA offers insight on supernova that may have been alluded to in ‘Hamlet’

450-year-old supernova’s shockwave still apparent; was visible to humans on Earth in 1572