NASA's DART asteroid-impact mission will be a key test of planetary defense
When the DART spacecraft impacts the asteroid Dimorphos on Sept. 26 in a test of our planetary defenses, it will be a continuation of work that started decades ago.
TroibNews 
When the DART spacecraft impacts the asteroid Dimorphos on Sept. 26 in a test of our planetary defenses, it will be a continuation of work that started decades ago.
