Alaska's Mysterious Spiral Leaves Aurora Hunter in Awe.

A photographer in Alaska captured a bright spiral in the sky while hunting for auroras. The spiral was caused by propellant released from a SpaceX rocket that carried more satellites into orbit as part of the Transporter-7 mission. Similar spirals have been spotted in the past, and while they may be a treat for those looking to capture such events, the explanation behind them takes away some of the mystery.