Noctilucent or polar mesospheric clouds, form at very high altitudes—between 80 and 85 kilometers (50–53 miles)—which positions them to reflect light long after the Sun has dropped below the horizon. Photograph Jan Erik Paulsen Read more
The limb of the Earth is a work of awesome beauty and a gift to science. When observed from space, the palette of gaseous layers of atmosphere reminds us of the fragility and tenuousness of the cocoon that shelters life from cold, harsh space.
This amazing video shows the moment a suspected meteor streaked across the sky over the city of Cusco in Peru. It was captured blasting through the upper levels of the atmosphere, leaving an iridescent trail in its wake. Read more
Severe thunderstorms rolled through western North Carolina on the evening of June 7, 2011. Though we were spared the worst of the wind and rain, ominous looking mammatus clouds glared down at storm’s end. Photographer Rich Bruner
These opposing skylines, one a solid silhouette the other vaporous but vividly hued, were observed from the balcony of my home in Turin, Italy on January 13, 2011. Photographer: Piero Armando Read more