261K views · 3.9K reactions | In July 1994, 21 fragments of Comet Shoemaker-Levy 9 collided with Jupiter. Each fragment carried enough force to cause a global catastrophe if it had struck Earth. Astronomers first observed the comet in 1993 and, through careful tracking, accurately predicted the impact more than a year in advance—forever changing our understanding of cosmic threats. See more from Randall: https://www.youtube.com/@TheRandallCarlson | Cosmic Summit | Facebook