Worth 10 quintillion dollars, the metal asteroid Psyche is a space miner’s fantasy – but there are better reasons to want to visit it, says Lindy Elkins-Tanton
THE solid metal centre of Earth is shrouded in mystery. Or, more accurately, in thousands of kilometres of molten metal and swirling magma. It is impossible to examine up close, so everything we know about it must be inferred.
What would we give to study a naked core directly? NASA’s answer is $850 million – the cost of a mission led by planetary scientist Lindy Elkins-Tanton, the director of Arizona State University’s School of Earth and Space Exploration. She is only the second woman to lead a NASA deep-space mission.
Due to launch in 2022, the mission will venture to an extraordinary asteroid between Mars and Jupiter. Some 210 kilometres across, asteroid 16 Psyche is unique in that it seems to be composed of solid metal.
It may represent the exposed core of a tiny planet that has had its outer layers smashed away, so Elkins-Tanton believes it could tell us a lot about the core and formation of our own planet. And its likely composition represents the ultimate fantasy for wannabe asteroid miners.
Why go to Psyche?
We want to learn about how Earth formed, but we can’t get to the core to test our ideas, so we are going to a metal world. It is the only place in the solar system where we can directly observe a planetary core.
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