A strange blue spiral lit up the sky over Europe on Monday night (March 24), with residents of the UK and other countries speculating on its true nature on social media.

Mysterious blue spiral spotted over European skies. What was it? (photos)

Source: space
Source Link: https://www.space.com/space-exploration/launches-spacecraft/mysterious-blue-spiral-spotted-over-european-skies-what-was-it-photos