Golden asteroid that could make everyone on Earth a billionaire

Artist's concept of the asteroid 16 Psyche, which is thought to be a stripped planetary core. [NASA]

A giant asteroid known as 16 Psyche contains enough precious heavy metals to make everyone on Earth a billionaire.

The asteroid, which is about 140 miles wide and orbits the Sun between the orbits of Mars and Jupiter, is the target of a NASA mission launching in 2022.