

Yup, the blue line is what’s left of the sunlight that has filtered through the ozone layer, which scatters red light apparently.
The red has gone through the lower atmosphere and scattered blue light, like an orange/red sunset.
But also this image was post processed with HDR to make it more visible.









Dead AAs don’t cost anything. They are otherwise headed to recycling or a dump. And they fit nicely in you pocket most of the time.
Broken spark plug ceramic works even better and will shatter tempered glass, but if cops catch you with it they might know what it’s for. The batteries are plausible pocket stuff.