Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)

Photo taken on Oct. 26, 2019 shows the aurora borealis, or Northern Lights, near the city of Tromso in northern Norway. (Xinhua/Zhang Cheng)