This clip was posted to TikTok by space expert @thegalacticgal. “DART’s target is the binary, near-Earth asteroid system Didymos, composed of the roughly 780-meter (2,560-foot)-diameter Didymos and the smaller, approximately 160-meter (530-foot)-size Dimorphos, which orbits Didymos,” NASA says on its Website. “DART will impact Dimorphos to change its orbit within the binary system, and the DART Investigation Team will compare the results of DART’s kinetic impact with Dimorphos to highly detailed computer simulations of kinetic impacts on asteroids.” “Doing so will evaluate the effectiveness of this mitigation approach and assess how best to apply it to future planetary defense scenarios,” NASA continues, “as well as how accurate the computer simulations are and how well they reflect the behavior of a real asteroid.”