This volcanic dust is from the Hunga-Tonga volcanic eruption that happened back in January and it seems to have settled up high in our atmosphere here in the Southern Hemisphere…. I’ve noticed that the particles must be very fine as the stars shine through the material, unlike when there’s a bush fire and the sky is very opaque.
https://www.nasa.gov/feature/goddard/2022/sun/nasa-mission-finds-tonga-volcanic-eruption-effects-reached-space
My images were taken at 6.pm an hour after sunset with a Canon 70D camera and a Tamron 18-400mm lens set at 18mm. The first image is an exposure of 4 seconds and ISO 200; second image is an exposure of 6 seconds and ISO 200.