The phrase suggests a degradation of the natural night environment due to excessive artificial light. This condition, often referred to as light pollution, obscures the visibility of stars and celestial objects, impacting astronomical observation and disrupting natural cycles. For example, increased skyglow over urban centers prevents residents from experiencing a truly dark night sky, diminishing the potential for stargazing and astronomical education.
The consequences of this degradation extend beyond astronomy. Reduced darkness can negatively impact wildlife, disrupting nocturnal animal behavior, migration patterns, and reproductive cycles. Furthermore, studies suggest a link between artificial light at night and adverse effects on human health, potentially affecting sleep patterns and hormone production. Historically, unobstructed views of the night sky were fundamental to navigation, timekeeping, and cultural narratives across various societies. The loss of this resource represents a significant environmental and cultural concern.
