MSNBC The Rachel Maddow Show November 25, 2021 02:53:00
Momentum of the pushed-off stuff would push the asteroid. that may work. but even simpler and more straightforward is just hitting the asteroid with something very small but going very, very fast. dart, double asteroid redirection test, is going about four miles a second. four miles a second. >> wow. >> so it has a lot of momentum. so when we hit this smaller asteroid, we are very hopeful that it will give it a nudge. now, the composition of the asteroids is not exactly known. so they're so-called xk asteroids. so we're hoping, or we're confident that when we hit it with this d.a.r.t. spacecra...