Pics show Antarctica's sky turning purple after volcanic eruption

Months after the Tongan volcanic eruption, the Antarctic sky has turned shades of purple due to the afterglow from the eruption. The Hunga Tonga-Hunga Ha'apai volcano erupted in January, triggering a tsunami. Following the eruption, aerosols made of sulphate particles, sea salt and water vapour circulated in the air, bending and scattering sunlight and creating a glow in the sky.