A SpaceX rocket launch from Florida on Monday afternoon produced a dazzling display in the night sky above Europe, leading to some people asking Elon Musk what they were witnessing.

The rocket's frozen exhaust plume appears to be spinning in the atmosphere and reflecting the sunlight,' the Met Office explained.

A glowing, swirling spiral of blue and purple was seen across the UK and also in parts of Europe on Monday night. But what was it? The cloud-like shape appeared for several minutes before disappearing, and experts think it was caused by leftover fuel from a rocket launch in the United States.