As showing how far under favourable conditions the reflection of light from a cloudy sky is visible, I may perhaps be allowed to mention that last night at nine o'clock the reflection of the ...

Scientists and policy makers just need to convince people to change how they use light at night — easier said than done. Science News sponsorship position. “People sometimes say light ...

Light at night can both attract and repel ... orange and amber light all that glitters: choose non-reflective finishes for your home. This reduces the scattered light that contributes to sky ...