Mount Kanlaon, one of the Philippines' most active volcanoes, erupted early Tuesday, sending an ash plume 4,000 meters (2.5 ...

As we approach the year’s end, the Ursid meteor shower offers a magical celestial celebration, under the cold, crisp skies of December. Coinciding beautifully with the winter solstice, this shower ...

With more sightings of the northern lights across the U.S. than usual in recent years, now is an excellent time to make the trek to a Dark Sky Place. Even if you don't see the rainbow of colors ...

An unusual celestial event is about to emerge in all of its fiery red glory over the Bay Area sky Thursday night ... will plunge into the Earth’s dark inner shadow, producing a total lunar ...