Asteroid 16 Psyche is one of the most intriguing objects in our solar system, not just because of its size—about 226 kilometers (140 miles) wide—but because of what it’s made of. Unlike most asteroids, which are primarily composed of rock or ice, Psyche appears to be composed mostly of metal—specifically iron and nickel—similar to the Earth's own core. Scientists believe it may be the exposed core of a protoplanet that suffered catastrophic collisions in the early days of the solar system, shedding its outer layers and leaving behind a dense, metallic remnant. This makes Psyche a rare window into the building blocks of planet formation, offering a unique opportunity to study a planetary core without having to dig thousands of kilometers beneath a planet’s surface. Its estimated value—around $10 quintillion in raw metals—is mind-boggling, far exceeding the entire global economy, though NASA’s mission is purely scientific, not commercial. The Psyche mission, launched in October 2023, is expected to arrive in 2029 and will orbit the asteroid for about 21 months, mapping its surface, measuring its magnetic field, and analyzing its composition. The data gathered could revolutionize our understanding of planetary interiors and the violent processes that shaped the early solar system.
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