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Europa Clipper message from Earth NASA's Europa Clipper spacecraft will carry a two-sided triangular plate that honors the mission's connection to Earth. One side of the plate (left) features U.S. Poet Laureate Ada Limón's handwritten "In Praise of Mystery: A Poem for Europa," the Drake Equation, and a portrait of planetary scientist Ron Greeley, whose early efforts to develop a Europa mission two decades ago laid the foundation for Europa Clipper. The other side of the plate (right) features waveforms that are visual representations of the sound waves formed by the word "water" in 103 languages. NASA/JPL-Caltech, Edited by The Planetary Society