On June 1, 2002, the world's first light-pollution law was enacted in the Czech Republic. The “Protection of the Atmosphere Act” required all lighting fixtures to have shielding to prevent light emission “above the horizontal.”
Laws against light pollution benefit astronomers. When light bounces around the atmosphere, it makes seeing things through telescopes much more difficult. Astronomers need to have a clear view of the stars and planets above.
Less light pollution not only helps astronomers—it helps consumers. Shielded lights do their job more efficiently—they shine more brightly on what we actually want to be lit. More efficient lighting also saves energy, reducing costs and conserving natural resources.
Term Part of Speech Definition Encyclopedic Entry astronomer Noun
person who studies space and the universe beyond Earth's atmosphere.
layers of gases surrounding a planet or other celestial body.
Encyclopedic Entry: atmosphere conserve Verb
to save or use wisely.
person who uses a good or service.
performing a task with skill and minimal waste.
discharge or release.
capacity to do work.
left-right direction or parallel to the Earth and the horizon.
natural resource Noun
a material that humans take from the natural environment to survive, to satisfy their needs, or to trade with others.
scientific instrument that uses mirrors to view distant objects.