Now have you ever seen the Milky Way? It's likely that artificial light will prevent you from doing so - unless you're somewhere like Exmoor.
Detailed satellite maps have revealed it as the darkest National Park in Southern England with 92% dark skies.
Exmoor National Park hopes to improve on this by dealing with light spillage from towns like Minehead and Porlock.
Dark skies have been a source of fascination for centuries, yet many children will grow up never seeing the Milky Way because of the impact of artificial light.
The core area of Exmoor National Park covers some 83 square kilometres of mostly moorland, surrounded by a bigger zone of 98 square kilometres, mainly farmed landscape and small settlements.