Comet NEOWISE (C/2020 F3) with the Northern Lights (aurora borealis) and a STEVE (Strong Thermal Emission Velocity Enhancement) arc aurora to the left. The Big Dipper is at upper left. A very faint green picket fence aurora is at right above the comet, a characteristic of STEVE arcs. This comet was discovered on 27th March 2020 by astronomers using the NEOWISE (Wide-Field Infrared Explorer) space telescope. It became visible to the naked eye by July 2020, and is one of the brightest comets since comet Hale-Bopp in 1997. It made its closest approach to the Sun on 3rd July 2020 at a distance of 43 million kilometres. Photographed over the Waterton River at Waterton Lakes National Park, Alberta, on July 13-14, 2020