No one has ever done this before!
On June 23rd, the students of Earth to Sky Calculus launched two space weather balloons separated by the entire Pacific Ocean. One balloon was released from Kawhia, New Zealand; the other from Bishop, California, more than 10,800 km away. The unprecedented double launch allowed us to compare cosmic rays in the atmosphere in two widely-separated places on Earth.
In addition to radiation sensors, the California payload also carried an iridescent crystal pyramid to the stratosphere. It flew 32.4 km (106,300 feet) above the Sierra Nevadas. After the balloon exploded (as planned), the payload parachuted back to Earth, landing in the foothills of the rugged White Mountains.
The students are selling this pyramid and several others like it to help pay their helium bill. Each one comes with a greeting card showing the pyramid in flight and telling the story of its journey to the edge of space. All sales support the Earth to Sky Calculus cosmic ray ballooning program and hands-on STEM research.