Plymouth's Bortle 6 skies sit between two outstanding dark-sky areas: Dartmoor National Park to the north-east and Bodmin Moor to the west, both reaching Bortle 3–4. As England's southernmost major city at 50.4°N, Plymouth has the country's shortest path to genuine astronomical darkness in summer, though nights are still brief in June. The south coast position gives an open, dark southern horizon over the English Channel, good for low-declination targets and the southern Milky Way in summer.