Jupiter X-ray aurora mystery solved

So you think Earth’s northern lights are big and majestic? In July 2021, Randy Gladstone of the Southwest Research Institute in San Antonio, Texas, said in a NASA statement:

That’s nothing … Jupiter has auroras bigger than our entire planet.

In that statement, planetary astronomers were announcing that they’d just solved a 40-year-old mystery about the origins of Jupiter’s unusual X-ray auroras. Read more on EarthSky