A stunning blue light likely caused by SpaceX Falcon 9 rocket fuel illuminated the night skies over Europe on Monday.

Stargazers across Europe saw a strange and mysterious blue spiral in the night sky that was likely caused by a SpaceX Falcon 9 rocket's launch. El Salvador's Bukele proposes prisoner swap with ...

0:36 Glowing spiral floats through U.K. night sky People across Europe witnessed a mysterious glowing blue spiral in the night sky this week, and scientists say they think they know what caused ...