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NASA's Europa Clipper spacecraft will carry a special message when it launches in October 2024 and heads toward Jupiter's moon Europa. The moon shows strong evidence of an ocean under its icy crust, with more than twice the amount of water of all of Earth's oceans combined. A triangular metal plate, seen here, will honor that connection to Earth. The plate is made of tantalum metal and is about 7 by 11 inches (18 by 28 centimeters). Engraved on both sides, it seals an opening in the electronics vault, which houses the spacecraft's sensitive electronics. The side shown here features U.S. Poet …
