"Every quarter-second the ASC takes an image of the stars," said Juno scientist John Leif Jørgensen, professor at the Technical University of Denmark. "Very en

"Every quarter-second the ASC takes an image of the stars," said Juno scientist John Leif Jørgensen, professor at the Technical University of Denmark. "Very energetic electrons that penetrate its shielding leave a telltale signature in our images that looks like the trail of a firefly. The instrument is programmed to count the number of these fireflies, giving us an accurate calculation of the amount of radiation," says Jørgensen. Reminds me of the method of using a cellphone camera covered with e-tape to measure radiation: https://www.nature.com/articles/s41598-021-92195-y https://www.nature.com/articles/s41598-021-92195-y