How to watch NASA's attempt to alter asteroid's trajectory in planetary defense test
NASA will attempt to slam a spaceship into an asteroid in hopes of changing its course Monday night.
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NASA will attempt to slam a spaceship into an asteroid in hopes of changing its course Monday night.
The 14,000-mph impact is designed to test whether a future threatening asteroid can be nudged off course.
Trouble cooling one of the giant rocket's engines and a balky valve needed for troubleshooting triggered a launch scrub.