Rosetta data reveal an invisible ultraviolet aurora around comet 67P
Solar wind electrons smash water molecules to make the comet’s version of the northern lights
![Comet 67P's aurora](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/09/092120_mt_comet-67P-aurora_feat.jpg?fit=1028%2C579&ssl=1)
Comet 67P has its own aurora — but unlike Earth’s vibrant northern and southern lights, 67P’s auroral flare shimmers in invisible ultraviolet light.
NAVCAM/Rosetta/ESA