Sensitive instruments to explore metal-rich asteroid

At the very center of the Earth is a core of metal--so hot and so deep down as to be unreachable and impossible to study directly. But we might learn more about it and the cores of other Earth-like planets by studying the asteroid Psyche. Based on observations made through telescopes, it is believed to consist of 60% metal, probably an iron and nickel alloy. Looking a bit like a potato and measuring about 150x250 km, Psyche may be the innermost core of a planet that, following a violent collisio...