Several recent news stories have reported that a mysterious anomaly in Cassini's orbit could potentially be explained by the gravitational tug of a massive new planet in our solar system, lurking far beyond the orbit of Neptune.
"An undiscovered planet outside the orbit of Neptune, 10 times the mass of Earth, would affect the orbit of Saturn, not Cassini," said William Folkner, a planetary scientist at JPL. Folkner develops planetary orbit information used for NASA's high-precision spacecraft navigation. "This could produce a signature in the measurements of Cassini while in orbit about Saturn if the planet was close enough to the sun. But we do not see any unexplained signature above the level of the measurement noise in Cassini data taken from 2004 to 2016."
While the proposed planet's existence may eventually be confirmed by other means, mission navigators have observed no unexplained deviations in the spacecraft's orbit since its arrival there in 2004, according to mission managers and orbit determination experts at NASA's Jet Propulsion Laboratory.
"Although we'd love it if Cassini could help detect a new planet in the solar system, we do not see any perturbations in our orbit that we cannot explain with our current models," said Earl Maize, Cassini project manager at JPL.
Scientists have been looking for Planet X for 100 years. The possibility that it's real got a big boost recently when researchers from Caltech inferred its existence based on orbital anomalies seen in objects in the Kuiper Belt, a disc-shaped region of comets and other larger bodies beyond Neptune. In January of 2016, Caltech researchers announced that they found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, which the researchers have nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune (which orbits the sun at an average distance of 2.8 billion miles). In fact, it would take this new planet between 10,000 and 20,000 years to make just one full orbit around the su
The researchers, Konstantin Batygin and Mike Brown, discovered the planet's existence through mathematical modeling and computer simulations but have not yet observed the object directly.
Brown notes that the putative ninth planet—at 5,000 times the mass of Pluto—is sufficiently large that there should be no debate about whether it is a true planet. Unlike the class of smaller objects now known as dwarf planets, Planet Nine gravitationally dominates its neighborhood of the solar system. In fact, it dominates a region larger than any of the other known planets—a fact that Brown says makes it "the most planet-y of the planets in the whole solar system."
"Although we were initially quite skeptical that this planet could exist, as we continued to investigate its orbit and what it would mean for the outer solar system, we become increasingly convinced that it is out there," says Batygin, an assistant professor of planetary science. "For the first time in over 150 years, there is solid evidence that the solar system's planetary census is incomplete."
A recent paper predicts that, if data tracking Cassini's position were available out to the year 2020, they might be used to reveal a "most probable" location for the new planet in its long orbit around the sun. However, Cassini's mission is planned to end in late 2017, when the spacecraft -- too low on fuel to continue on a longer mission -- will plunge into Saturn's atmosphere.
The Cassini-Huygens mission is a cooperative project of NASA, ESA and the Italian Space Agency. JPL, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate in Washington.
The Daily Galaxy via http://www.nasa.gov/cassini and Caltech
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This ESA/NASA Hubble Space Telescope image features the moving heart of the Crab Nebula.
While many other images of the famous Crab Nebula have focused on the filaments in the outer part of the nebula, this image shows the very heart of the Crab Nebula including the central neutron star — it is the rightmost of the two bright stars near the centre of this image.
The rapid motion of the material nearest to the central star is revealed by the subtle rainbow of colours in this time-lapse image, the rainbow effect being due to the movement of material over the time between one image and another.
Read more here.
Credit: ESA/NASA
Marathon journey across solar system concludes with 35-minute rocket burn
Nasa's Juno mission is spending its first week in orbit around Jupiter. This giant planet is more than 11 times the diameter of Earth.
Having travelled for more than 1.7bn miles through the solar system, Juno was captured by Jupiter's gravity at 03:18 GMT on 5 July after an engine burn that lasted 35 minutes.
Related: Nasa's New Horizons spacecraft ready for Pluto fly-by
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Air and Waste Management Association Annual Conference and Exhibition
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June 20 - 23, 2016
Giant gas ball four times the mass of Jupiter is in a three-star system. It swings around one, but sees sunrises and sunsets from all three. Take that Tatooine
A gaseous planet with three suns and a mass four times that of Jupiter has been spotted by astronomers.
Located 320 light years away in the constellation of Centaurus the planet, known as HD 131399Ab, goes one better than Luke Skywalker's home planet of Tatooine in the film Star Wars, which famously boasted two sunrises.
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Oliver Burkeman says it's hard to bark orders at a machine without feeling like the kind of obnoxious person who barks orders at waiters
I became highly confused the first time I used the Amazon Echo, a voice-activated “smart home assistant” that sits in the corner and responds to the name Alexa as in “Alexa, play some music!” or “Alexa, how many ounces in a kilogram?” Partly, this was because the only person I know who owns an Echo is herself called Alexa, and she was home at the time. But that aside, it's hard to bark orders at a machine without feeling like the kind of obnoxious person who barks orders at waiters. That is, unless you start young. “We love our Amazon Echo… but I fear it's also turning our daughter into a raging asshole,” the Silicon Valley investor Hunter Walk fretted recently. Alexa doesn't need you to say please or thank you; indeed, she responds better to brusque commands. “Cognitively, I'm not sure a kid gets why you can boss Alexa around, but not a person,” Walk wrote. How's a four-year-old supposed to learn that other household members aren't simply there to do her bidding, when one (electronic) household member was designed to do exactly that?
Such worries will grow more urgent as we interact with more convincingly humanesque devices. As the tech writer John Markoff puts it: “What does it do to the human if we have a class of slaves which are not human, but that we treat as human?” Most of us would agree with Immanuel Kant that it's unethical to treat others as mere means to our own ends, instead of ends in themselves. That's why slavery damages the slaveholder as well as the slave: to use a person as if they were an object erodes your own humanity. Yet Alexa (like Google Home, and Siri, and the rest) trains us to think of her as both human yet solely there to serve. Might we start thinking of real humans that way more frequently, too?
Continue reading...Shooter, who was killed with bomb on robot device during standoff, was reportedly upset over recent killings of black men by law enforcement
The gunman who opened fire on police in Dallas said he wanted to kill white police officers and expressed anger at a recent spate of shootings by police before he was killed, it was revealed on Friday.
Related: Dallas protest shooting: five police officers dead and standoff over live
Continue reading...Master stone carver Bernat Vidal chisels a piece of Seneca sandstone during the 2016 Smithsonian Folklife Festival in Washington, D.C. Vidal is making a rough replica of a corbel from the Smithsonian Castle. (Photo by Michelle Z. Donahue)
Peering closely at the surface of the ruddy red Maryland sandstone block, Bernat Vidal sets a chisel resolutely against the stone and confidently taps it with a wood-handled mallet. With every strike, puffs of dust wisp upward, and tiny sharp chips fly off in all directions.
Vidal, unflinching, etches the beginnings of an incised line into a semi-circle that he has already coaxed out of the squared-off stone. With the easy reflex of 30 years' practice, he flicks away larger shards to reveal the beginnings of an ornate corbel to crown a stone column.
The column in question is on the west face of the Smithsonian's iconic red sandstone Castle, and the sculptor bending to the task traveled from the Basque Country, located in northern Spain and southern France, to share his craft with the public at the 2016 Smithsonian Folklife Festival on the National Mall in Washington, D.C. The unique Seneca Creek sandstone block from a nearby quarry is very similar to the buttery sandstone Vidal chisels in his studio outside Bilbao, on Spain's northern coastline.
Master stone carver Bernat Vidal displays a photograph of a corbel from the Smithsonian Castle that he is using to create a replica from a piece of Seneca sandstone. Vidal was working on the National Mall as part of the 2016 Smithsonian Folklife Festival. His corbel will eventually go on display in the Castle's Schermer Hall. (Photo by Michelle Z. Donahue)
“We gave Mr. Vidal a couple of pieces of Seneca sandstone from our attic stock and a photograph of one of the Castle's decorative corbels,” says Paul Westerberg, registrar for the Castle Collection. “He's going to leave it unfinished and rough for us in order to show his tool marks in the stone.”
Vidal's unfinished block will eventually go on display in the Castle's Schermer Hall next to an 1846 Castle model by architect James Renwick “as a representative sample of how these carvings are made,” Westerberg adds. “People normally only see the finished product. It's rare to see something in the process of its creation. We were very happy a master stone carver was working on the Mall.”
Though once renowned in the Middle Ages for their skill, today, only a handful of traditional Basque stone workers continue the craft. Originally a painter and ceramics artist, Vidal came to the tradition almost on a whim, but became so smitten that he began to teach to the younger generation at a stone carvers' college in Bilbao 20 years ago.
Among his works: a 1.5-ton coat of arms, carved from a 6-ton block, mounted on the City Hall of Guernica, an important symbol of Basque autonomy before and after it was bombed during World War 2; and the Puerta del Mar in the Dominican Republic, commissioned in 1992 for the 500th anniversary of the discovery of the Americas.
Vidal laments the economic realities that make even highly regarded traditional craft a lackluster prospect for Basque youth, though he hopes that his efforts in educating others and demonstrating the craft may yet bring renewed interest to the trade.
Insider writer Michelle Donahue spoke to Vidal during a lull at the Festival, and he shared some of his thoughts on the history and future of Basque traditional stone carving.
Vidal: Basque carvers were very important during the Crown of Castile [the consolidation of Spanish kingdoms in the 13th century]. These were carvers whose works were very much sought after, but then this art was all forgotten because all of this work was being done outside of Basque country. So, the Basque people as well as the rest of Spain have lost the tradition. For me to discover this art form was very beautiful.
Vidal: Historically, it was for house building and making artistic works. It was even further divided than that, with specialists in different forms. Nowadays, 80 percent is for custom work at houses, family crests, or the name of the house in stone with different designs, because in Spain traditional homes have names.
A selection of the work of master stone carver Bernat Vidal, from the Basque Country in northern Spain and southern France. Vidal is in Washington, D.C. as a participant in the 2016 Smithsonian Folklife Festival in Washington, D.C. (Photo by Michelle Z. Donahue)
Vidal: In the village where I lived, there was strong stone influence—not in carving, but in quarrying. Then I had the opportunity to take a carving class and I loved it, the complexity of the rock. It was something that filled me.
Vidal: It wasn't too easy, but it wasn't too difficult, either. When you are absolutely dedicated to something, you slowly begin to master it.
Has your work attracted the interest of young people who want to learn from you?
Approximately 20 years ago, I was a professor at the stone carvers college in Bilbao. But now with the economic crisis in Spain, few are interested. It's a tough and dirty job, and people nowadays prefer to be in front of a computer.
Vidal: By virtue of seeing it here, people can value the effort that is required to do this kind of work, and that there are very few people who actually do this. Truthfully, I've been surprised—people have been very interested in all of the aspects of my work, with a desire to learn [about] my craft.
Vidal: It's intriguing. Where I'm from in Navarre there is also a different kind of red stone that looks exactly the same. But upon a closer look there are differences—that one has larger grains and it's more abrasive, whereas this one is much finer and is very malleable, but breaks very easily.
Vidal: It's difficult to say. It's a very detail-oriented job. I'd calculate that if I was back in my shop, I'd say about a week.
Vidal: I can always send it back because it would be great to show all of the phases of the work, so others can see what is necessary to prepare a stone for carving. But the Basques also like this type of stonework, so they might want to keep it! [laughs]
The post Castle corbel chisled by Basque Country stone carver Bernat Vidal appeared first on Smithsonian Insider.
Knowing what we take from our oceans matters. Smithsonian scientists are developing tools to better understand and protect our oceans. One project they are working on is a mobile app that collects catch data from remote fishing communities. Find out more at ourfish.org
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US one sheet for ON MY WAY TO THE CRUSADES, I MET A GIRL WHO… aka THE CHASTITY BELT (Pasquale Festa Campanile, Italy, 1969)
Designer: uncredited
Poster source: Heritage Auctions
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Understanding REDD+
For a deeper understanding of REDD+ and forest carbon, check out:
REDD Dawn: The Birth Of Forest Carbon
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Comment Rolls-Royce and the Advanced Autonomous Waterborne Applications Initiative (AAWA) believe the future of cargo transportation is autonomous and they have published an 88 page white paper (PDF) to prove it.…
Three new astronauts currently rocketing up to space in the Soyuz spacecraft will be conducting new experiments, including sequencing DNA and blasting computers with radiation.…
Jean Campbell is dedicated to her craft—building “reborn” dolls that bear a shocking resemblance to real-life babies. In this short documentary, Reborning, Campbell explains the meticulous process of creating these dolls, and her motivations behind doing so. She says goal for the finished product is to have a doll that is indistinguishable from the real thing: "You want it to be so real-looking that heads turn and say, 'Oh what a beautiful baby, can I hold it?'"
The film is produced, directed, and edited by Yael Bridge and Helen Hood Scheer, who also served as cinematographer. Bridge is currently working on the feature-length documentary Saving Capitalism, and Scheer is an Assistant Professor at California State University Long Beach in the Department of Film and Electronic Arts.
Tears for Alton Sterling, haute-couture fashion, a swollen river in China, a rocket to the International Space Station, gorgeous goldfish, Eid al-Fitr in a 14th century mosque, lightning strikes the Las Vegas strip, and much more.
Inquirer | AI system sifts through drinker feedback to make tastier beer Inquirer ROBOT-MADE BEER is now a thing thanks to the IntelligentX Brewing Company, which uses artificial intelligence (AI) to fine-tune beer to the taste buds of piss heads connoisseurs. The brewer joined forces with machine learning company Intelligent Layer ... This beer has been brewed with an AIAlphr Your next bottle of beer could well be brewed by an artificial intelligenceT3 Beer brewed with the help of AI? Yup, that's now a thingWired.co.uk CNET -Science World Report -Forbes -Engadget all 11 news articles » |
Ferdinand von Zeppelin Scientist of the Day
Count Ferdinand von Zeppelin, a German aeronautical inventor, was born July 8, 1838.
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