Behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different
Since the 1970s, chemists have worked on storing solar energy in molecules that change state in response to light. These photoactive molecules could be the
The American flag flaps in the breeze against the backdrop of a halo around the sun at the US track and field championships in Eugene,
The 531 foot-tall PS20 tower, located near Seville in Spain is the world’s most powerful solar power tower. Is capable of generating 20 mega-watts of
The photo above showing irisation (iridescence) in cumulus clouds was taken over the sharp summits of Gran Paradiso National Park, Italy. Photographer: Piero Armando
The sequence above shows the setting Sun dipping toward the western horizon as observed from Veszprem, Hungary. As the Sun sinks lower, its color becomes
The photo above showing an eye-catching 22-degree halo and upper tangent arc was captured just before sunset over Dayton, Ohio on January 21, 2011.
One of the rarest of Earth’s astronomical events is a ghostly glow called the zodiacal light that the ancient Greeks believed that it was caused
The photo above shows the scenic Blackstone Glacier emptying into Blackstone Bay in southeastern Alaska. Blackstone Glacier is one of a number of tidewater glaciers
At an electric plant in southern Spain, mirrors as big as houses catch some of the 120 quadrillion watts of sunlight that constantly fall on
