Monday, June 13, 2016
National Geographic Photo of the Day: June 13th of 2016
June 13, 2016
Crackling Cold
Photograph by Anton Petrus, National Geographic Your Shot
The icy surface of Russia’s Lake Baikal cracks around the rocky outcropping of Elenka Island. Photographer Anton Petrus braved winter temperatures to capture this sunset image.Astronomy Picture of the Day: June 13th of 2016
Unexplained Dimmings in KIC 8462852
Illustration Credit: NASA, JPL-Caltech
Explanation: Why does star KIC 8462852 keep wavering? Nobody knows. A star somewhat similar to our Sun, KIC 8462852 was one of many distant stars being monitored by NASA's robotic Kepler satellite to see if it had planets. Citizen scientists voluntarily co-inspecting the data along with computers found this unusual case where a star's brightness dropped at unexpected times by as much as 20 percent for as long as months -- but then recovered. Common reasons for dimming -- such as eclipses by orbiting planets or stellar companions -- don't match the non-repetitive nature of the dimmings. A currently debated theory is dimming by a cloud of comets or the remnants of a shattered planet, but these would not explain data indicating that the star itself has become slightly dimmer over the past 125 years. Nevertheless, featured here is an artist's illustration of a planet breaking up, drawn to depict NGC 2547-ID8, a different system that shows infrared evidence of such a collision. Recent observations of KIC 8462852 did not detect the infrared glow of a closely orbiting dust disk, but gave a hint that the system might have such a disk farther out. Future observations are encouraged and creative origin speculations are sure to continue.
Sunday, January 31, 2016
National Geographic Photo of the Day: January 31st of 2016
January 31, 2016
In the Frosty Air
Photograph by Gvido Satori, National Geographic Your Shot
The moonlight makes an enchanting backdrop for plants coated in frost. Gvido Satori made this photo while walking “an ordinary country road” one night in Latvia. “I like to take the Nikon D810 [and] a small LED flashlight and go on a small adventure,” he writes. “In the night, everything is different.”
Astronomy Picture of the Day: January 31st of 2016
Image Credit & Copyright: Peter Tuthill (Sydney U.)& James Lloyd (Cornell)
Sunday, December 27, 2015
National Geographic Photo of the Day: December 27th of 2015
December 27, 2015
Forty Winks
Photograph by Mihir Ranjan, National Geographic Your Shot
Not even an intrusive camera lens could disturb this little amphibian. Your Shot member Mihir Ranjan happened upon this sleeping red frog clinging to a leaf near his hometown of Chaibasa in JhavdDahand, India.Astronomy Picture of the Day: December 27th of 2015
Image Credit: J. Morse (Arizona State U.), K. Davidson (U. Minnesota) et al., WFPC2, HST, NASA
Tuesday, December 8, 2015
National Geographic Photo of the Day: December 8th of 2015
December 8, 2015
Peekaboo
Photograph by Can Tunçer, National Geographic Your Shot
While in his garden at his home in İzmir, Turkey, Your Shot member Can Tunçer caught this inquisitive insect peeking over the top of a leaf. “This [was] a one-time opportunity,” he writes.
Astronomy Picture of the Day: December 8th of 2015
Image Credit & Copyright: Elizabeth M. Ryan; Rollover Annotation: Judy Schmidt
Monday, December 7, 2015
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National Geographic Photo of the Day: December 7th of 2015
December 7, 2015
Windblown Sunset
Photograph by Alexandros Maragos, National Geographic Your Shot
The sun sets over the Panachaiko mountain range, located near Patras, Greece, and its wind turbines in this image captured by Your Shot member Alexandros Maragos. Panachaiko is home to Greece’s largest wind farm, with more than 40 turbines, which were completed in 2006.
Astronomy Picture of the Day: December 7th of 2015
Image Credit & Copyright: Fritz Helmut Hemmerich
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