I tacy "naukowcy" prowadzą badania nad NLC. cyt:
"The light that bounces off these clouds passes through the ozone layer before it gets to our eyes. Ozone absorbs red light and allows blue light to pass through, which is why these clouds take on a striking blue colour."
https://theconversation.com/blue-noctilucent-clouds-are-appearing-further-south-than-ever-seen-before-and-pollution-may-be-a-cause-119771