Saturn’s auroras are clearly visible in this composite image made by NASA’s Cassini spacecraft. #Blue #light corresponds to reflected #sunlight, #red to the planet’s own heat, and #green to emissions from #hydrogen #ions in the #aurora.

June 22, 2021

https://www.quantamagazine.org/cassini-data-solves-jupiter-and-saturns-energy-mystery-20210622/
#Cassini #Data Solves #Jupiter and #Saturn's #Energy #Mystery