A glowing spiral dubbed an ‘alien space portal’ was spotted above the UK leaving residents starstruck. The mysterious spinning blueish-white spiral was reportedly caused by illuminated frozen fuel expelled from one of Elon Musk's SpaceX rockets, experts have said. The light blue spiral is formed when excess fuel that has been released from the fast-spinning rocket turns to ice. It then reflects the sunlight in the upper atmosphere – giving it an otherworldly gleam – before turning to water vapour. Read more at DailyMail.com 🎥 Instagram/angelasaveva 🎥 Twitter/clexee_clem #space #britain #mystery #spacex #elonmusk #sky #fuel