Frequently asked
Is tonight good for stargazing at Roque de los Muchachos?
The live score above pulls today's forecast and runs it through StarCast's scoring model, factoring in cloud cover, moon illumination, Bortle class, humidity, and atmospheric transparency. Above 70 is an excellent night. Below 40, conditions are poor. The score updates daily.
What makes Roque de los Muchachos good for astrophotography?
The Roque de los Muchachos Observatory sits at 2,396 meters on the rim of the Caldera de Taburiente on La Palma in the Canary Islands, making it one of the premier optical astronomy sites in the Northern Hemisphere. The island of La Palma holds a Starlight Reserve designation, and its sky quality law, the first of its kind in the world, has protected the site's darkness since 1988. Above the trade wind inversion layer, the air is exceptionally dry and stable, with seeing conditions that rival any site on Earth outside the high Andes. The observatory's multiple telescope domes, including the Gran Telescopio Canarias, are accessible to visitors by road during daylight.
When is the Milky Way visible at Roque de los Muchachos?
The galactic core is visible from March through October. Summer (June through August) is the most reliable window: the trade wind cloud layer sits well below the summit, leaving the observatory above a sea of cloud with nothing between it and the sky. The core transits high in the south from this latitude, giving excellent compositions above the caldera rim. The road to the summit (GC-110) is open to the public during the day, and some areas near the summit can be accessed at night for photography, though access to the telescope area is restricted after hours.
