... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... It is indeed a feeble light that reaches us from the starry sky. ... Many of us have been dazzled at one time or another by an intense light source, such as a stadium's floodlights or a neighbour's security light, or struggled to see the wonders of the night sky through the now-familiar yellow glow that accompanies any profusely illuminated area such as a car park or shopping centre. ... Consider light waste. ...