schwit1 writes Using its new top-shelf graphics processing unit, Nvidia tackles one of the most persistent conspiracy theories in American history: the veracity of the 1969 to 1972 Apollo moon landings. From the article: "'Global illumination is the hardest task to solve as a game company,' Scott Herkelman, Nvidia's GeForce general manager, said in an interview. 'Virtual point lights don't do a bad job when the environment stays the same, but a game developer has to fake shadows, fake reflections...it's a labor-intensive process.' So when a Nvidia research engineer used the company's new dynamic lighting techniques to show off a side-by-side comparison between an Apollo 11 photo and a GeForce-powered re-creation, the company knew it had a novel demo on its hands. 'We're going to debunk one of the biggest conspiracies in the world,' Herkelman said."
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mdsolar writes with an update on the People's Climate March. More than 400,000 people turned out for the People's Climate March in New York City on Sunday, just days before many of the world's leaders are expected to debate environmental action at the United Nations climate summit. Early reports from event organizers are hailing the turnout as the largest climate march in history, far bigger than the Forward on Climate rally held in Washington, D.C., last year. High-profile environmentalists including Bill McKibben, Leonardo DiCaprio, Jane Goodall and Vandana Shiva marched alongside policymakers such as Sens. Sheldon Whitehouse (D-R.I.), Bernie Sanders (I-Vt.) and Charles Schumer (D-N.Y.). U.N. Secretary-General Ban Ki-moon and former Vice President Al Gore were also there, and more than 550 buses carried in people from around the country.
Oculus Rift revealed today its new 'Crescent Bay' prototype wearable display, at its inaugural Oculus Connect conference. (You can find more in the company's blog too.) From Gamasutra's coverage: The new headset has 360 degree tracking and integrated audio, as well as improved performance that allows better presence, says Iribe. It has higher resolution and a better refresh rate than even its recent DK2 headset. It's also much lighter than earlier prototypes. The company has also licensed technology from RealSpace 3-D for improved 3D audio on Oculus moving forward. Audio is becoming a priority for the company, [CEO Brendan] ]Iribe said. Road to VR has a gushing hands-on review: One of the stand-out demos put me in front of an alien on some sort of Moon-like world. The alien was looking at me and speaking in an unfamiliar tongue. When I moved my head, its gaze followed me. Its big and detailed eyes, combined with reaction to me as I moved, imbued it with a sense of living that was really cool. Spaceships flew over head and drew my gaze behind me, leading me to look at some incredibly detailed scenery.
An anonymous reader writes: $3 billion in funding is on the line as private space companies duke it out for contracts to end U.S. reliance on Russian rockets for manned spaceflight. The two biggest contenders are SpaceX and Boeing, described as "the exciting choice" and "the safe choice," respectively. "NASA is charting a new direction 45 years after sending humans to the Moon, looking to private industry for missions near Earth, such as commuting to and from the space station. Commercial operators would develop space tourism while the space agency focuses on distant trips to Mars or asteroids." It's possible the contracts would be split, giving some tasks to each company. It's also possible that the much smaller Sierra Nevada Corp. could grab a bit of government funding as well for launches using its unique winged-shuttle design.
KentuckyFC writes One of the great mysteries in astrophysics surrounds the origin of ultra-high energy cosmic rays, which can have energies of 10^20 electron volts and beyond. To put that in context, that's a single proton with the same energy as a baseball flying at 100 kilometers per hour. Nobody knows where ultra-high energy cosmic rays come from or how they get their enormous energies. That's largely because they are so rare--physicists detect them on Earth at a rate of less than one particle per square kilometer per century. So astronomers have come up with a plan to see vastly more ultra high energy cosmic rays by using the Moon as a giant cosmic ray detector. When these particles hit the lunar surface, they generate brief bursts of radio waves that a highly sensitive radio telescope can pick up. No radio telescope on Earth is currently capable of this but astronomers are about to start work on a new one that will be able to pick up these signals for the first time. That should help them finally tease apart the origins of these most energetic particles in the Universe .
An anonymous reader writes "Moon+ Pro Reader, FBReader, Kindle, you name it--many popular Android e-book apps can run on a smartphone available for $20 and shipping. The trick is to respect the device's limits and keep down the number of apps you install. This fun isn't for eager multitaskers. On the bright side, the $20 phone can do Acapela TTS, includes a 4GB memory card and works with cards of up to 32GB--easily enough for scads of pre-loaded books. Plus, the WiFi is great. And the screen of 3.2 inches isn't that much smaller than the 3.5 inchers on the older iPads. What could cell phone e-reading mean in the many "book deserts" of the U.S.? And how about the U.K. where miserly pols are closing libraries even though the Guardian says "a third of UK children do not own a single book and three-quarters claim never to read outside school"? The smartphone post on the LibraryCity site tells how librarians and others could start "cell phone book clubs" to promote the discovery and absorption of books as well as smarter use of technology."
An anonymous reader writes: We often decry the state of funding to NASA. Its limited scope has kept us from returning to the moon for over four decades, maintained only a minimal presence in low-Earth orbit, and failed to develop a capable asteroid defense system. But why is funding such a problem? Jason Callahan, who has worked on several of NASA's annual budgets, says it's not just NASA's small percentage of the federal budget that keeps those projects on the back burner, but also competition for funding between different parts of NASA as well. "[NASA's activities include] space science, including aeronautics research (the first A in NASA), technology development, education, center and agency management, construction, maintenance, and the entire human spaceflight program. The total space science budget has rarely exceeded $5 billion, and has averaged just over half that amount. Remember that space science is more than just planetary: astrophysics, heliophysics, and Earth science are all funded in this number. Despite this, space science accounts for an average of 17 percent of NASA's total budget, though it has significant fluctuations. In the 1980s, space science was a mere 11½ percent of NASA's budget, but in the 2000s, it made up 27 percent."
Luminary Crush (109477) writes Most of the detected exoplanets thus far have been gas giants which aren't great candidates for life as we know it. However, many of those planets are in fact in the star's habitable zone and could have moons with conditions more favorable. Until now, methods to detect the moons of such gas giants have been elusive, but researchers at the University of Texas, Arlington have discovered a way to detect the interaction of a moon's ionosphere with the parent gas giant from studies of Jupiter's moon Io. The search for 'Pandora' has begun.
I am interested in a telescope for the use of some elementary and middle school aged relatives. Older and younger siblings, and parents, would no doubt get some scope time, too. Telescopes certainly come in a range of prices, from cheap to out of this world, and I am purely a duffer myself. But I enjoy looking at the moon and stars with magnification, and think they would, too. What I'm trying to find might be phrased like this: "the lowest priced scope that's reasonably robust, reasonably accurate, and reasonably usable for kids" -- meaning absolute precision is less important than a focus that is easy to set and doesn't drift. Simplicity in design beats tiny, ill-labeled parts or an incomprehensible manual, even if the complicated one might be slightly better when perfectly tuned. I'd be pleased if some of these kids decide to take up astronomy as a hobby, but don't have any strong expectation that will happen -- besides, if they really get into it, the research for a better one would be another fun project. That said, while I'm price sensitive, I'm not looking *only* at the price tag so much as seeking insight about the cluster of perceived sweet spots when it come to price / performance / personality. By "personality" I mean whether it's friendly, well documented, whether it comes intelligently packaged, whether it's a crapshoot as to whether a scope with the same model name will arrive in good shape, etc -- looking at online reviews, it seems many low-end scopes have a huge variance in reviews. What scopes would you would consider giving to an intelligent 3rd or 4th grader? As a starting point, Google has helped me find some interesting guides that list some scopes that sound reasonable, including a few under or near $100. (Here's one such set of suggestions.) What would you advise buying, from that list or otherwise? (There are some ideas that sound pretty good in this similar question from 2000, but I figure the state of the art has moved on.) I'm more interested in avoiding awful junk than I am expecting treasure: getting reasonable views of the moon is a good start, and getting at least some blurry rings around Saturn would be nice, too. Simply because they are so cheap, I'd like to know if anyone has impressions (worth it? pure junk?) of the Celestron FirstScope models, which are awfully tempting for under $50.
schwit1 writes: Using restored images taken by Voyager 2 when it flew past Neptune's moon Triton 25 years ago, scientists have produced a new map and flyby movie of the moon. "The new Triton map has a resolution of 1,970 feet (600 meters) per pixel. The colors have been enhanced to bring out contrast but are a close approximation to Triton's natural colors. Voyager's "eyes" saw in colors slightly different from human eyes, and this map was produced using orange, green and blue filter images. ... Although Triton is a moon of a planet and Pluto is a dwarf planet, Triton serves as a preview of sorts for the upcoming Pluto encounter. Although both bodies originated in the outer solar system, Triton was captured by Neptune and has undergone a radically different thermal history than Pluto. Tidal heating has likely melted the interior of Triton, producing the volcanoes, fractures and other geological features that Voyager saw on that bitterly cold, icy surface. Pluto is unlikely to be a copy of Triton, but some of the same types of features may be present." Dr. Paul Schenk provides provides further information on his blog, and the movie can be viewed here.
An anonymous reader writes "Phil Plait wants you to know that asteroid 1950 DA is very, very unlikely to hit the Earth in 2880, despite what you may have read. He writes: "As it happens, 1950 DA is what's called a 'near-Earth asteroid', because its orbit sometimes brings it relatively close to Earth. I'll note that I mean close on a cosmic scale. Looking over the next few decades, a typical pass is tens of millions of kilometers away, with some as close as five million kilometers — which is still more than ten times farther away than the Moon! Still, that's in our neighborhood, which is one of the reasons this asteroid is studied so well. It gets close enough that we can get a decent look at it when it passes. Can it impact the Earth? Yes, kindof. Right now, the orbit of the asteroid doesn't bring it close enough to hit us. But there are forces acting on asteroids over time that subtly change their orbits; one of them is called the YORP effect, a weak force that arises due to the way the asteroid spins and radiates away heat. The infrared photons it emits when it's warm carry away a teeny tiny bit of momentum, and they act pretty much like an incredibly low-thrust rocket. Over many years, this can change both the rotation of the asteroid as well as the shape of its orbit."
StartsWithABang (3485481) writes It's finally here! Sure, we witnessed the birth of a new meteor shower earlier this year, but it was a flop. Many other showers have come-and-gone like they do every year, but none of them have given us a significant number of meteors-per-hour. But even with a near-full Moon out, it's finally time for the Perseids, the most reliable meteor shower year-after-year. Here's where to find them, where they come from and a whole lot more, including some surprising facts about where they don't come from: cometary tails!
astroengine writes The debate as to whether Pluto is a planet or a dwarf planet rumbles on, but in a new animation of the small world, one can't help but imagine another definition for Pluto. As NASA's New Horizons spacecraft continues its epic journey into the outer solar system, its Kuiper Belt target is becoming brighter and more defined. Seen through the mission's Long Range Reconnaissance Imager (LORRI) camera, this new set of observations clearly shows Pluto and its biggest moon Charon locked in a tight orbital dance separated by only 11,200 miles. (Compared with the Earth-moon orbital separation of around 240,000 miles, you can see how compact the Pluto-Charon system really is.) Both bodies are shown to be orbiting a common point — the "barycenter" is located well above Pluto's surface prompting a new debate on whether or not Pluto and Charon should be redefined as a "binary planet".
schwit1 writes: "With a drive of 157 feet on Sunday, the Mars rover Opportunity broke the Soviet record, set by Lunokhod 2 in 1973, for the longest distance traveled by a vehicle on another planet. "If the rover can continue to operate the distance of a marathon — 26.2 miles (about 42.2 kilometers) — it will approach the next major investigation site mission scientists have dubbed "Marathon Valley." Observations from spacecraft orbiting Mars suggest several clay minerals are exposed close together at this valley site, surrounded by steep slopes where the relationships among different layers may be evident. The Russian Lunokhod 2 rover, a successor to the first Lunokhod mission in 1970, landed on Earth's moon on Jan. 15, 1973, where it drove about 24.2 miles (39 kilometers) in less than five months, according to calculations recently made using images from NASA's Lunar Reconnaissance Orbiter (LRO) cameras that reveal Lunokhod 2's tracks."
First time accepted submitter jIyajbe (662197) writes Two researchers from the Indian Institute of Astrophysics investigate the imaginary world of Kalgash, a planetary system based on the novel 'Nightfall' (Asimov & Silverberg, 1991). From the arXiv paper: "The system consists of a planet, a moon and an astonishing six suns. The six stars cause the wider universe to be invisible to the inhabitants of the planet. The author explores the consequences of an eclipse and the resulting darkness which the Kalgash people experience for the first time. Our task is to verify if this system is feasible, from the duration of the eclipse, the 'invisibility' of the universe to the complex orbital dynamics." Their conclusion? "We have explored several aspects of Asimov's novel. We have found that the suns, especially Dovim are bright enough to blot out the stars. Kalgash 2 can eclipse Dovim for a period of 9 hours. We also tested one possible star configuration and after running some simulations, we found that the system is possible for short periods of time."
sciencehabit writes In mid-October, a comet sweeping through our inner solar system for the first time will pass near Mars—so close, in fact, that if it were buzzing Earth at the same distance it would fly by well inside our moon's orbit. While material spewing from the icy visitor probably won't trigger the colossal meteor showers on the Red Planet that some scientists predicted, dust and water vapor may still slam into Mars, briefly heating up its atmosphere and threatening orbiting spacecraft. However it affects the planet, the comet should give scientists their closest view yet of a near-pristine visitor from the outer edges of our solar system.
An anonymous reader writes On July 20, 1969, U.S. astronauts Neil Armstrong and Buzz Aldrin became the first humans to walk on the moon. Neil Armstrong would say later he thought the crew had a 90% chance of getting home from the moon, and only a 50% chance of landing safely. The scope of NASA's Apollo program seems staggering today. President Kennedy announced his moon goal just four years into the Space Age, but the United States had not even launched a human into orbit yet. Amazingly, just eight years later, Armstrong and Aldrin were walking on the moon.
An anonymous reader writes: Astronomers have documented hundreds of holes on the lunar surface. These aren't simply craters, but actual pits ranging from 5 to 900 meters across. Scientists suspects many of these will lead to underground cave systems, which NASA says would be great spots for an astronaut habitat once we get back to the Moon. "A habitat placed in a pit — ideally several dozen meters back under an overhang — would provide a very safe location for astronauts: no radiation, no micrometeorites, possibly very little dust, and no wild day-night temperature swings," said Robert Wagner of Arizona State University. He says it's time to send probes into a few of these pits to see what they're like: "Pits, by their nature, cannot be explored very well from orbit — the lower walls and any floor-level caves simply cannot be seen from a good angle. Even a few pictures from ground-level would answer a lot of the outstanding questions about the nature of the voids that the pits collapsed into. We're currently in the very early design phases of a mission concept to do exactly this, exploring one of the largest mare pits."
An anonymous reader writes Scotland could take a giant leap for mankind by becoming the home of Britain's first spaceport. UK Government ministers will announce on Tuesday eight potential sites for a base for sending rockets and tourists into orbit. RAF bases at Kinloss and Leuchars are believed to be among contenders for the spaceport, which would open in 2018 and be Britain's answer to Cape Canaveral. Chief Secretary to the Treasury Danny Alexander said: "I am delighted that the government is pushing forward with its ambitious plans to open a spaceport in the UK by 2018. Spaceports will be key to us opening up the final frontier of commercial space travel. Scotland has a proud association with space exploration. We celebrated Neil Armstrong's Scottish ancestry when he became the first man on the Moon and only last week an amazing Scottish company was responsible for building the UK Space Agency's first satellite. The UK space industry is one of our great success stories and I am sure there will be a role for Scotland to play in the future."