NASA's Psyche spacecraft recently made a close flyby of Mars, zooming just 2,800 miles above the surface at a blistering 12,000 mph. The result? A stunning, almost psychedelic time-lapse that's unlike anything captured before. But Mars was only a pit stop — Psyche used the planet's gravity to slingshot itself toward its true destination: a mysterious metal asteroid that scientists think may be the exposed core of a long-dead planet. Psyche is expected to arrive in 2029.