NASA crashing spacecraft into asteroid

Planetary defense test will try to knock asteroid off orbit.

  • This illustration depicts NASA’s DART probe, foreground right, at the Didymos system before impact with the asteroid Dimorphos, left. (STEVE GRIBBEN/Johns Hopkins APL/NASA via AP)
    This illustration depicts NASA’s DART probe, foreground right, at the Didymos system before impact with the asteroid Dimorphos, left. (STEVE GRIBBEN/Johns Hopkins APL/NASA via AP)
    CAPE CANAVERAL — In the first-of-its kind, save-the-world experiment, NASA is about to clobber a small, harmless asteroid millions of miles away. A spacecraft named Dart will zero in on...

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