Japan's Decade-Long Mission to Mine an Asteroid

1999 JU3: It doesn't sound like a very noteworthy name. It's just one of more than 5,000 Apollo-class asteroids. But 1999 JU3 could become a household name if Japan succeeds in mining it—a mission that JAXA has struggled with for decades, often disastrously. And on Sunday, it revealed the probe that could redeem it. » 9/02/14 5:45pm 9/02/14 5:45pm