In 1972, NASA launched a gold-anodized aluminum plaque onboard the Pioneer 10 spacecraft. Its purpose: To tell alien civilizations about Earth. Today the plaque is at the edge of interstellar space. On Oct. 24, 2020, the students of Earth to Sky Calculus launched their own copy onboard a cosmic ray balloon.
This ceramic Pioneer 10 plaque traveled 102,362 feet above the Sierra Nevada mountains of California, experiencing near-vacuum, cosmic rays, and space-like cold. It's the closest thing on Earth to the actual plaque. And it comes with a red ribbon for hanging on your Christmas tree! You'll also receive a greeting card showing the ornament in flight and telling the story of its journey to the edge of space and back again.