A general view of the aurora borealis near the city of Tromsoe in northern Norway January 25, 2012.

The Aurora Borealis (Northern Lights) is seen over a mountain camp north of the Arctic Circle, near the village of Mestervik, Norway September 30, 2014.

The Aurora Borealis (northern lights) illuminate the sky of Lapland region, in Inari, Finland, December 2017.

The Aurora Australis is seen from an image taken by the crew of Expedition 29 on board the International Space Station, on an ascending pass from south of Australia in the Southern Pacific Ocean to the Northern Pacific Ocean, west of Central America September 18, 2011.

Swirls of green and red appear in an aurora over Whitehorse, Yukon on the night of September 3, 2012 in this NASA handout image. The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth's magnetosphere. The CME left the Sun on August 31 and arrived on September 3.

The Aurora Borealis (Northern Lights) is seen over the sky near the village of Pallas (Muonio region) of Lapland, Finland September 8, 2017.

Aurora borealis, or northern lights, fill the sky over Finnmark during the 1000 km (621 miles) long Finnmarkslopet, world's northernmost sled dog race, taking place in Finnmark county, northern Norway, March 13, 2011.

The Northern Lights are seen above the ash plume of Iceland's Eyjafjallajokull volcano in the evening April 22, 2010.

The Aurora Borealis (Northern Lights) is seen over the Bals-Fiord near the village of Mestervik, north of the Arctic Circle, early October 2, 2014.

The wildfires glow underneath The Northern Lights, also known as the Aurora Borealis, near Fort McMurray, Alberta, Canada, May 7, 2016.

The glow of the Aurora Borealis, or Northern Lights, is seen in the horizon in the Kawartha Lakes region, southern Ontario February 23, 2015. The colorful cosmic display of the northern lights is rarely seen in Ontario.

An Aurora Borealis (Northern Lights) is seen over a mountain camp north of the Arctic Circle, near the village of Mestervik late September 30, 2014. Image used for illustrative purposes.

The Aurora Borealis (Northern Lights) is seen over the sky near the village of Pallas (Muonio region) of Lapland, Finland September 8, 2017.

The Aurora Borealis (Northern Lights) is seen over the sky near Rovaniemi in Lapland, Finland, March 14, 2018. Reuters/Alexander Kuznetsov

The Aurora Borealis (Northern Lights) is seen over the sky near the village of Pallas (Muonio region) of Lapland, Finland September 8, 2017.