The cause of the strange blue spiral is actually a SpaceX Falcon 9 rocket that blasted off from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida at 1:48 p.m. EDT (1748 GMT) on Monday. The rocket was carrying the secretive NROL-69 mission for the National Reconnaissance Office (NRO).

People in Yorkshire are mesmerised this evening by a blue and white spiral in the sky. Experts say the blue and white spiral is caused by Elon Musk's Space X rocket. Will Cheung took to X to clarify: "This is likely to be excess fuel that had been released from a SpaceX rocket, it has been witnessed before over different locations."

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