Researchers have already shown that Jovian lightning appears as bright flashes of green. This image was taken by NASA's Juno spacecraft on Dec. 30, 2020. (Image credit: NASA/JPL-Caltech/SwRI/MSSS ...

The spacecraft was 32,000 kilometers (19,900 miles) above Jupiter's clouds near the north pole at 78 degrees of latitude when it captured the green bolt. The principle of lighting is the same on ...