NASA's Psyche spacecraft will use Mars' gravity today (May 15) for a crucial boost on its six-year journey to a metallic asteroid.

A NASA spacecraft chasing a rare metal asteroid is swinging past Mars for a gravity boost. The Psyche spacecraft will slingshot past the red planet at more than 12,000 mph Friday.

NASA's Psyche spacecraft will slingshot past Mars on Friday, on its way toward a rare metal-rich asteroid.