In April 2021, astronomy educator John Heasley set out to see just how dark the skies were in southwestern Wisconsin's Vernon County. He measured the brightness of the night sky in three public ...

Light-emitting diodes (LEDs) are so ubiquitous that it's easy to forget just how much society relies on these underappreciated technological wonders. Yet, the history of the LED goes back further than ...

A mysterious spiraling blue light illuminated the night skies over Europe on Monday. The cosmic whirlpool was captured in stunning video and appears to have been created by the SpaceX Falcon 9 rocket ...

The DesignLights Consortium (DLC) this month finalized a policy aimed at promoting installation of commercial lighting ...