NASA’s DART Mission Tests Earth’s Defenses Against Asteroids | WSJ

The spacecraft crashed into an asteroid the size of the Washington Monument. NASA’s DART spacecraft intentionally collided with an asteroid on Monday evening, in an attempt to alter the space rock’s trajectory. The mission tested technology that could help defend Earth against potential future asteroid threats. Photo: NASA/Johns Hopkins University Applied Physics Laboratory More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Visit the WSJ Video Center: https://wsj.com/video On Facebook:   / videos   On Twitter:   / wsj   On Snapchat: https://on.wsj.com/2ratjSM #WSJ #NASA #DART