Not to worry, this is normal. But climate change may be playing a role.
As summer gets under way in the Southern Hemisphere, electric blue clouds seeded by meteor dust begin to glow high in the sky over Antarctica’s vast icy reaches.
This year, according to NASA, these night-shining, or “noctilucent,” clouds turned up much earlier than usual. This corresponds to an early seasonal shift into into the warmer season at lower altitudes over Antarctica.
Here’s how the space agency describe