Loic Poidevin / Observatory of Gornergrat, Mont Cervin, Matterhorn, Swiss Alps, Valais, Switzerland, September 2018.

David Fleetham / An aerial view of 'Science City' high altitiude observatory above the clouds in Haleakala National Park, Maui's dormant volcano, Hawaii, June 2011.

Lou Coetzer / Observatory on horizon, Kagga Kamma Reserve, Cederberg Mountains, South Africa, January 2013.

Inaki Relanzon / Gornergrat Station with observatory domes, Monte Rosa and Cervino (The Matterhorn) massif on the horizon, Pennine Alps, Switzerland, April 2011.

GEORGETTE DOUWMA / Observatories on Mauna Kea Hawaii USA

Gary Braasch / The National Oceanic and Atmospheric Administration's atmospheric and space observatory, at 3400 meters on the northeast flank of Mauna Loa volcano. The observatory consists of 10 buildings from...

Gary Braasch / Vial of air collected to analyse CO2 content at the National Oceanic and Atmospheric Administration's atmospheric and space observatory, Mauna Loa, Hawaii. March, 2011.

Gary Braasch / The National Oceanic and Atmospheric Administration's atmospheric and space observatory, at 3400 meters on the northeast flank of Mauna Loa volcano at sunset. Big Island, Hawaii. March, 2011.

Jack Dykinga / The Hall 42 inch telescope at Lowell Observatory at night, in a designated dark sky area, with the Milky Way in sky above, Anderson Mesa Dark Sky Site, Arizona, USA. April, 2022.

Roland Seitre / Haleakala Observatory, Haleakala National Park, Maui, Hawaii. March, 2022.

Enrique Lopez-Tapia / Astronomical observator and, space radio telescope at sunset above the clouds, on the highest point of the island, Roque de los Muchachos, Caldera de Taburiente National Park, La Palma, Canary Islands...

David Fleetham / View from the summit of Haleakala, a dormant volcano, at sunset. The observatories, collectively known as Science City are on the far left, Haleakala National Park, Maui, Hawaii. July, 2021.