A rare rainbow “jellyfish cloud” was spotted in the sky above Weatherford, Texas, on Tuesday, April 15. Video filmed by Chad ...

The telescope, apart from its size, benefits from the exceptionally dark sky above Mount Paranal, which is the least light-polluted among all major astronomical locations in the western world.

The latter will tonight be 23%-lit and much higher above Venus, with notable “Earthshine” detectable on its dark side. This ...

(When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the ...

Seeking to dim light pollution and restore the natural aura of the night sky, Palo Alto's elected leaders signaled support on ...