NASA's Psyche asteroid mission: a 3.6 billion kilometre 'journey to the centre of the Earth'
Psyche was only the 16th “asteroid” ever discovered: inhabitants of the Solar System that were neither the familiar planets nor the occasional visitors known as comets.
- Psyche was only the 16th “asteroid” ever discovered: inhabitants of the Solar System that were neither the familiar planets nor the occasional visitors known as comets.
- With an average diameter of around 226km, the potato-shaped planetoid is the largest “M-type” asteroid, made largely of iron and nickel, much like Earth’s core.
- Natural laboratories
M-type asteroids like Psyche are thought to be the remnants of planets destroyed in the early years of the Solar System. - In these asteroids, heavier elements (like metals) sank toward the centre and lighter elements floated up to the outer layers.