Green Flash Over Setting Sun
Skywatcher Amir H. Abolfath captured this photo of the setting sun over the Zagros Mountains of Iran. The green flash above the sun lasts for mere seconds making it often difficult to observe.
Orion from Viking View
Skywatcher Per-Magnus Heden wondered if the Vikings gazed at the same starry sky, which includes the constellation Orion at bottom, when he took this photo in Feb. 2011.
Green Belt Northen Lights
Skywatcher Kwon, O Chul of The World At Night (TWAN), shot this image of the Northern Lights at Yellowknife in northern Canada.
Chimney Smoke Solar Eclipse
Skywatcher Aleksandr Yuferev captured the first partial solar eclipse of the year through smoke from a chimney in Russia. The eclipse was visible from Europe to North Africa, Middle East and central Asia.
The photographer was in a dark Alpine forest near Tyrol, about 19 miles (30 kilometers) south of Innsbruck. Multiple exposures are made to collect enough light for an image that would otherwise not be evident to the eye.
Lunar and solar halos are caused when light passes through ice crystals formed in clouds through the sky.
Auroral Violet Hues
Skywatcher Yuichi Takasaki took this photo of deep violet hues in an auroral display. Multiple exposures are made to collect enough light for an image that would otherwise not be evident to the eye.
The region lies near the southern end of Taurus located on the border of the constellations of Taurus and Perseus more than 400 light-years away. A light-year is the distance light travels in one year, or about 6 trillion miles (10 trillion kilometers).
airplane full moon
Hungarian Skywatcher Tamas Ladanyi of The World At Night (TWAN) took this stunning photo of the smallest full moon of 2011, which occurred Oct. 11.
Multiple exposures are made to collect enough light for an image that would otherwise not be evident to the eye.