Lab hike to Fjellheisen and Fløya, September 17 2021 (photo credit: Hamid)
Sun Graph for Tromsø (latitude, 69.649; longitude, 18.955) for 2020. Daylight area represents time when sun is above the horizon while civil, nautical and astronomical twilight refers to times when sun is 6°, 12°, and 18° below the horizon, respectively. Code to create sun graphs for any latitude and longitude is available on the lab Github site.