The project in the Atacama Desert could increase light pollution by up to 50%, making it much harder to observe the cosmos ...

The city has received complaints about excessive lighting throughout Ypsilanti, City Planner Joshua Burns said.

There are very few places left in the country where there is so little artificial light that the ... There are several dark sky areas in the United States, the National Park Service says ...

These artificial clouds are produced by releasing chemical compounds from high-altitude probes, typically at elevations between 80 and 400 kilometers above the Earth’s surface. The primary ...

As the city of Maricopa continues to expand with new businesses and residential developments, so too does an often-overlooked ...

A remarkable series of experiments shows that migratory birds navigate by the stars. In a planetarium their flight direction is controlled by the position of the stars in the artificial sky ...