A strange swirl in the sky seen over much of Britain and Europe this week wasn’t the result of alien activity but rather a SpaceX Falcon 9 rocket. The UK’s Met Office, which monitors weather conditions in Britain, announced that the striking vision seen overhead was not a cause for concern but the result of a rocket launch.

The rocket launched from Florida’s Cape Canaveral Space Force Station during the afternoon hours, but it was already dark across Europe when it lifted off. As it zoomed across the sky to reach space, it produced a mesmerizing blue spiral that left many Europeans scratching their heads.