Nasa's Psyche spacecraft launched on Friday on a six-year journey to a rare metal-covered asteroid.Most asteroids tend to be rocky or icy, and this is the first exploration of a metal world. Scientists believe it may be the battered remains of an early planet's core, and could shed light on the inaccessible centres of Earth and other rocky planets.SpaceX launched the spacecraft into a midmorning sky from Nasa's Kennedy Space Centre in Florida. Named after the asteroid it is chasing, Psyche shoul

Nasa's Psyche spacecraft launched on Friday on a six-year journey to a rare metal-covered asteroid.Most asteroids tend to be rocky or icy, and this is the first exploration of a metal world. Scientists believe it may be the battered remains of an early planet's core, and could shed light on the inaccessible centres of Earth and other rocky planets.SpaceX launched the spacecraft into a midmorning sky from Nasa's Kennedy Space Centre in Florida. Named after the asteroid it is chasing, Psyche should reach the huge, potato-shaped object in 2029.