Among the interplay of Saturn’s shadow and rings, Mimas, which appears in the lower-right corner of the image, orbits Saturn as a set of the ever-intriguing spokes appear in the B ring (just to the right of center).
Scientists expect that spokes will soon cease to form as Saturn approaches northern equinox. The exact mechanism of spoke formation is still the subject of debate, but ring scientists do know that spokes no longer appear when the Sun is higher in Saturn’s sky. It is believed that this has to do with the ability of micron-sized ring grains to maintain an electrical charge and levitate above the rings, forming spokes. Thus, these may be some of the last spokes ever imaged by Cassini.
This view looks toward the unilluminated side of the rings from about 38 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft wide-angle camera on Oct. 22, 2013.
The view was obtained at a distance of approximately 1.6 million miles (2.6 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 146 degrees. Image scale is 93 miles (150 kilometers) per pixel.
Via the Twitter timeline of official White House photographer @petesouza, our photo of the day. I’m sure conservatives will be pleased that the President is wearing an expensive suit for this one. Actually, I’m not sure.
In 1967, Dr. William Podlich took a two-year leave of absence from teaching at Arizona State University and began a stint with UNESCO (United Nations Educational, Scientific and Cultural Organization) to teach in the Higher Teachers College in Kabul, Afghanistan, where he served as the “Expert on Principles of Education.” His wife Margaret and two daughters, Peg and Jan, came with him. Then teenagers, the Podlich sisters attended high school at the American International School of Kabul, which catered to the children of American and other foreigners living and working in the country.
Outside of higher education, Dr. Podlich was a prolific amateur photographer and he documented his family’s experience and daily life in Kabul, rendering frame after frame of a serene, idyllic Afghanistan. Only about a decade before the 1979 Soviet invasion, Dr. Podlich and his family experienced a thriving, modernizing country. These images, taken from 1967-68, show a stark contrast to the war torn scenes associated with Afghanistan today.
Conservators restoring an Antarctic exploration hut recently made a remarkable discovery: a small box of 22 exposed but unprocessed photographic negatives, frozen in a solid block of ice for nearly one hundred years.
These negatives were meticulously processed and restored by a Wellington photography conservator. Antarctic Heritage Trust executive director Nigel Watson said of these never-before-seen images:
“It’s the first example that I’m aware of, of undeveloped negatives from a century ago from the Antarctic heroic era. There’s a paucity of images from that expedition.”
The team from the Antarctic Heritage Trust (NZ) discovered the box in a corner of one of the many supply depots Robert Falcon Scott established for his doomed Terre Nova Expedition to the South Pole (1910-1913). Though Scott reached the Pole, he and his party died of starvation and the extreme cold on their return trip.
This photo was created by Matt Molloy, using a technique called “timestacking” to combine hundreds of time-lapse photos into one image.
There are many more of Molloy’s mind-blowing pictures at the links above. Incredible stuff.