Transcript for NASA Spacecraft Set to Explore Giant Asteroid That Could Destroy Earth
NASA plans to take a closer look at a big rock that could give the air a big jolts. The space agency is launching a study of a so called Armageddon asteroid named it venue in about a 120 years that Ben knew many. Get close enough that the Earth's gravity pulls it towards us. Scientists say if it hit the impact will be 200 times the strength of the atomic bomb dropped on Hiroshima.
This transcript has been automatically generated and may not be 100% accurate.