The sky Law (Canary Islands). The regulation that protects one of the best skies on the planet
If you have observed the stars from La Palma, you have probably noticed something special: the sky is darker, clearer, and more intense than in most places in the world.
This is not a coincidence. It is the result of a pioneering regulation known as the Sky Law in the Canary Islands, one of the most advanced legislations in the world for protecting the night sky.
Thanks to this law, the archipelago —and especially La Palma— has become an international reference for astronomy and astrotourism.
🌌 What exactly is the Sky Law?
The so-called Sky Law is the common name for Law 31/1988 on the protection of the astronomical quality of the observatories of the Institute of Astrophysics of the Canary Islands.
Its objective is clear: to guarantee optimal conditions for astronomical observation from the observatories located in the Canary Islands.
More official information at Sky Law (Institute of Astrophysics of the Canary Islands)
🔭 What does this law regulate?
The Sky Law goes far beyond lighting. It is a comprehensive regulation that protects the scientific environment on several levels:
- Light pollution: control of artificial lighting to prevent skyglow (see also our article on why controlling light pollution matters)
- Radio interference: limitation of signals that affect telescopes
- Atmospheric pollution: control of emissions that could reduce sky transparency
- Air traffic routes: regulation of flight paths to avoid disturbances
This makes the Canary Islands one of the few places in the world where the sky is protected in an integrated way.
🌍 Why is it unique in the world?
Although similar initiatives exist in other countries, the Sky Law was one of the first regulations of its kind at a global level.
Its approach is especially advanced because it:
- Protects the sky as a scientific resource
- Integrates multiple types of pollution
- Is directly linked to world-class research infrastructures
This model has served as an international reference for other night sky protection initiatives.
🏝️ La Palma: a natural laboratory of the Universe
Thanks to this law, places like the Roque de los Muchachos Observatory enjoy exceptional conditions:
- More than 300 clear nights per year
- Extremely low light pollution
- High atmospheric stability
This allows telescopes from all over the world to be installed on the island and carry out cutting-edge astrophysical research.
More information about the observatory: Roque de los Muchachos Observatory – IAC
✨ Science, tourism and conservation
Protecting the sky not only benefits science. It has also driven the development of astrotourism.
La Palma was the first destination in the world to be recognized as a Starlight Reserve and Destination, a certification that guarantees the quality of the night sky. In fact, La Palma was chosen for the signing of the Starlight Declaration (2007), promoted by UNESCO, which recognizes the universal right to starlight.
The night sky is also a natural heritage that must be protected.
From La Palma, we not only observe the Universe. We also learn how to preserve it. This allows visitors and astronomy enthusiasts to enjoy unique experiences, from stargazing and night photography to observatory visits.