On Dec. 6, 2019, the students of Earth to Sky Calculus launched a cosmic ray balloon to the stratosphere over the Sierra Nevada Mountains of central California. This Northern Lights pendant went along for the ride, 107,612 feet high. After the balloon exploded, as planned, the payload parachuted back to Earth, landing near the Silver Peak lithium mines in western Nevada, more than 100 miles from the launch site. The pendant had a wild ride, and the students got great data for their atmospheric radiation monitoring program.
 
Each pendant comes with a greeting card showing the necklace in flight and telling the story of its journey to the edge of space and back.