Modern-day light pollution has excessive energy consumption ... The Milky Way is now hidden from 80% of North America. At Kitt Peak National Observatory, located an hour from downtown Tucson ...

The universe doesn’t revolve around Kitt Peak, but the observatory southwest ... DESI can capture the light from 5,000 galaxies at once, relaying it downstairs to 10 spectographs packed together ...

Physicists had long assumed that the elusive force has constant strength. But the latest results from a project to map the ...