Aurora borealis, the Northern Lights, photographed over spruce trees near Fairbanks, Alaska. Auroras are luminous displays that appear in the night sky at high latitudes; they form rays, bands, arcs, streamers & curtains, often coloured red or green. They are caused by charged subatomic particles from the Sun interacting with atoms & molecules in Earth's upper atmosphere (above about 100 km). The reason that they appear at high latitudes is that the particles from the Sun are concentrated over the poles by Earth's magnetic field.

Photo website with Rights Managed and Royalty Free stock photos, images, illustrations and footage available for download immediately for commercial and editorial uses. Aflo is a leading independent supplier and producer of stock pictures and visual content. Search and find high quality images and video for design, print, web-use and publishing. Buy photos from our extensive collection of model released and property released sports images. Search some of the most beautiful travel and landscape pictures from our own photographers and license from our large collection of content, modern and archive, focusing on Japan. We provide free research. Register for personal account management and for full use of our Stock Photography website and start to download images now.