It sounds like something out of a movie: NASA launches a spacecraft to redirect an asteroid threatening planet Earth.
- Yep, that's something that's really happening. On Tuesday night, NASA will launch the D.A.R.T., or Double Asteroid Redirection Test.
- The spacecraft will travel for 10 months to the asteroid moon Dimorphos, slamming into it at 15,000 miles per hour in the hopes of knocking it off its path.
- Don't worry, Dimorphos isn't a threat to the Earth - it's just a test of the technology in case of a real asteroid emergency.
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