italiastar posted a photo:
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Slate Magazine (blog) | The Emmys Have a Knack for Being Both Stodgy and Trailblazing at Once Slate Magazine (blog) Joining The Americans as a first time Best Drama contender is the incisive Mr. Robot, whose star Rami Malek adds some fizz to the Best Actor in a Drama category. ... I'm sure these groups have overlapping taste, but this dynamic would explain both the ... and more » |
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tezzer57 posted a photo:
Balham, South London
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Shore bug (Saldula laticollis) collected in Jasper National Park, Alberta, Canada, and photographed at the Centre for Biodiversity Genomics (sample ID: BIOUG06729-G11; specimen record: http://www.boldsystems.org/index.php/Public_RecordView?processid=SSJAE1693-13; BIN: http://www.boldsystems.org/index.php/Public_BarcodeCluster?clusteruri=BOLD:AAG8807)
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Stan in FL posted a photo:
This is the only dragonfly on the USA Federally Endangered Species list. Once thought to be extinct, the Hine's Emerald was rediscovered at the Mink River Estuary, Wisconsin in 1987. Today, Door County, Wisconsin harbors the largest population of this dragonfly in the world. Now the Hine's Emerald is found in very small populations in only 3 other states, IL., MI., MO. It is unlawful to kill, harass, or possess specimens. The Mink River Estuary is a Great Lakes coastal wetland fed by ground and surface waters as well as by Lake Michigan. This estuary, where the waters of Mink River and Lake Michigan meet, is considered one of the few high quality, freshwater estuaries remaining in North America. The preserve protects almost the entire shoreline of Mink River and much of the river's surface watershed, helping safeguard water quality and wildlife habitat. The Hine's Emerald lives in calcareous (high in calcium carbonate) spring fed marshes and sedge meadows overlaying dolomite bedrock.
They spend up to five years as larvae, surviving in small wetland streams fed by groundwater. The adult will live only 3-5 weeks. The best month to see the Hine's Emerald is July and early August at the Ridges Sanctuary in Door County, WI. This is where I saw several. Seeing this dragonfly was the highlight of a 4500 mile road trip.
Somatochlora hineana
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Few nighttime sights offer more drama than the full Moon rising over the horizon. Now imagine that instead of the Moon, a gas giant planet spanning three times more sky loomed over the molten landscape of a lava world. This alien hell exists in the two-planet system that includes rocky Kepler-36b, discovered in 2012 that has a turbulent orbital relationship with its neighboring world, 36c. Every 97 days that planet, a “hot Neptune” gas giant comes perilously close to 36b, roughly five times the distance between the Earth and the Moon.
"These two worlds are having close encounters," said Josh Carter, a Hubble Fellow at the Harvard-Smithsonian Center for Astrophysics (CfA).
Harvard-Smithsonian artist David Aguilar imagined the glorious spectacle shown above, with the purple gas giant "hot Neptune 36C looming some 2.5 times larger in the sky than our own moon. These picturesque planetary fly-bys that occur every 97 days on average that would trigger tremendous gravitational tides that would squeeze and stretch both planets, triggering even more volcanic activity on 36b, a planet already defined by its lava flows and 1300-degree Fahrenheit temperatures. (The image above shows what 36c might look like from 36b).
"They are the closest to each other of any planetary system we've found," added co-author Eric Agol of the University of Washington.
They spotted the planets in data from NASA's Kepler spacecraft, which can detect a planet when it passes in front of, and briefly reduces the light coming from, its parent star.
The newfound system contains two planets circling a subgiant star much like the Sun except several billion years older. The inner world, Kepler-36b, is a rocky planet 1.5 times the size of Earth and weighing 4.5 times as much. It orbits about every 14 days at an average distance of less than 11 million miles.
The outer world, Kepler-36c, is a gaseous planet 3.7 times the size of Earth and weighing 8 times as much. This "hot Neptune" orbits once each 16 days at a distance of 12 million miles.
The two planets experience a conjunction every 97 days on average. At that time, they are separated by less than 5 Earth-Moon distances. Since Kepler-36c is much larger than the Moon, it presents a spectacular view in its neighbor's sky. (Coincidentally, the smaller Kepler-36b would appear about the size of the Moon when viewed from Kepler-36c.) Such close approaches stir up tremendous gravitational tides that squeeze and stretch both planets.
Researchers are struggling to understand how these two very different worlds ended up in such close orbits. Within our solar system, rocky planets reside close to the Sun while the gas giants remain distant.
Although Kepler-36 is the first planetary system found to experience such close encounters, it undoubtedly won't be the last.
"We're wondering how many more like this are out there," said Agol.
"We found this one on a first quick look," added Carter. "We're now combing through the Kepler data to try to locate more."
This result was made possible with asteroseismology. Asteroseismology is the study of stars by observing their natural oscillations. Sunlike stars resonate like musical instruments, due to sound waves trapped in their interiors. And just like a musical instrument, the larger the star, the "deeper" are its resonances. This trapped sound makes the stars gently breathe in and out, or oscillate.
Co-author Bill Chaplin (University of Birmingham, UK) noted, "Kepler-36 shows beautiful oscillations. By measuring the oscillations we were able to measure the size, mass and age of the star to exquisite precision."
He added, "Without asteroseismology, it would not have been possible to place such tight constraints on the properties of the planets."
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The Daily Galaxy via CfA and University of Washington
When "Star Trek" was first broadcast in 1966, the largest telescopes on Earth could only see about halfway across the universe -- the rest was uncharted territory. But Hubble's powerful vision has carried us into the true "final frontier." Celebrating its 50th anniversary this year, "Star Trek" has captured the public's imagination with the signature phrase, "To boldly go where no one has gone before." NASA's Hubble Space Telescope doesn't "boldly go" deep into space, but it is "boldly peering" deeper into the universe than ever before to explore the warping of space and time and uncover some of the farthest objects ever seen.
This is epitomized in the latest Hubble image released today in time for the new motion picture "Star Trek Beyond." The Hubble image unveils a very cluttered-looking universe filled with galaxies near and far. Some are distorted like a funhouse mirror through a warping-of-space phenomenon first predicted by Einstein a century ago.
In the center of the image is the immense galaxy cluster Abell S1063, located 4 billion light-years away, and surrounded by magnified images of galaxies much farther.
Thanks to Hubble's exquisite sharpness, the photo unveils the effect of space warping due to gravity. The huge mass of the cluster distorts and magnifies the light from galaxies that lie far behind it due to an effect called gravitational lensing. This phenomenon allows Hubble to see galaxies that would otherwise be too small and faint to observe. This "warp field" makes it possible to get a peek at the very first generation of galaxies. Already, an infant galaxy has been found in the field, as it looked 1 billion years after the big bang.
This frontier image provides a sneak peak of the early universe, and gives us a taste of what the James Webb Space Telescope will be capable of seeing in greater detail when it launches in 2018.
The cluster contains approximately 100 million-million solar masses, and contains 51 confirmed galaxies and perhaps over 400 more.
The Frontier Fields program is an ambitious three-year effort, begun in 2013, that teams Hubble with NASA's other Great Observatories -- the Spitzer Space Telescope and the Chandra X-ray Observatory -- to probe the early universe by studying large galaxy clusters. Identifying the magnified images of background galaxies within these clusters will help astronomers to improve their models of the distribution of both ordinary and dark matter in the galaxy cluster. This is key to understanding the mysterious nature of dark matter that comprises most of the mass of the universe.
The Daily Galaxy via NASA/Hubble Space Telescope