People are treated to a recreation of the Northern Lights thanks to a laser light art installation in Woolwich, a historic town in the borough of Greenwich, London, on September 10, 2021. (Photos: CGTN/CFP)

As part of the Greenwich and Docklands International Festival at Royal Artillery Barracks, the artwork "Borealis" is created by shining high-powered laser beams through clouds of particles that present the "variations in movement, color and density."

As part of the Greenwich and Docklands International Festival at Royal Artillery Barracks, the artwork "Borealis" is created by shining high-powered laser beams through clouds of particles that present the "variations in movement, color and density."