The sky is filled with reds, purples, blues and greens during the largest solar flare of the year, leaving the aurora borealis visible over campus on Tuesday night.
The northern lights peak their way through trees and campus buildings in the middle of the night.
Light and stars fill the sky over the Grainger Engineering Library.
A group of students gather on the Main Quad to take photos of the aurora borealis.
The sky is painted with reds and speckled with stars.
A green band of light above the Illini Union on the North end of the Main Quad.