Light pollution

Definition

Light pollution is the excessive or misdirected artificial light that obscures the night sky and interferes with astronomical observations. It primarily affects the visibility of celestial objects and reduces the effectiveness of telescopes.

5 Must Know Facts For Your Next Test

1. Light pollution can be categorized into different types such as skyglow, glare, and light trespass.
2. Skyglow is the brightening of the night sky over populated areas, making it difficult to see stars.
3. Glare occurs when intense light causes visual discomfort and diminishes contrast in astronomical observations.
4. Light trespass happens when unwanted artificial light spills over into areas where it is not needed or wanted, impacting both people and observational equipment.
5. Mitigating light pollution involves using properly shielded outdoor lighting and implementing 'dark sky' policies to preserve night-time visibility.

Review Questions

Related terms

Skyglow: The brightening of the night sky over populated areas due to artificial lighting.

Glare: Intense artificial light that causes visual discomfort and reduces contrast.

Dark Sky Policies: Regulations aimed at reducing light pollution to preserve night-time visibility for both astronomers and wildlife.