Slashdot Mirror
Domain: discovery.com
Stories and comments across the archive that link to discovery.com.
Stories · 632
-
Hotspot Found On Moon's Far Side
derGoldstein tips this news from Discovery.com: "Scientists have found evidence of volcanoes on the far side of the moon. The new discovery, reported in the journal Nature Geoscience (abstract) is a rare example of volcanism on the lunar surface not associated with asteroid, meteor or comet impact events. ... They focused on an area containing numerous domes, some more than six kilometers high. The domes featured steeply sloping sides which Jolliff and colleagues interpret as, 'volcanic in origin and formed from viscous lava.'" -
Atlantis' Final Reentry Over Cancun, Mexico
astroengine writes "Once again, videographer Noe Castillo has captured space shuttle history through his camera lens. On June 1, 2011, he witnessed the final reentry of space shuttle Endeavour. Now he's released a video via his YouTube account showing the final reentry of Atlantis... and the final reentry of any space shuttle." Many other cameras were trained on Atlantis yesterday, including one from the ISS, which captured the re-entry from the other side. Thierry Legault caught Atlantis transiting the sun for the last time, and NASA has pictures and video of the landing. -
Do 'Ultracool' Brown Dwarfs Surround Us?
astroengine writes "The recent discovery of two very cool 'T-class' brown dwarfs in our cosmic neighborhood has prompted speculation that there may be many more ultracool 'failed stars' nearby (abstract). Not only are these objects themselves very interesting to study, should there be many such brown dwarfs spanning interstellar space. Perhaps they could be used as 'stepping stones' to the stars." -
NASA Probe Orbiting Asteroid Vesta
astroengine writes "Mission managers of NASA's Dawn asteroid probe had a long Saturday, waiting for news from the asteroid belt. Eventually they got the news they were hoping for: Dawn had entered Vesta orbit. This is the first time in history that an object in the asteroid belt has been orbited by an artificial satellite. It's taken four years for the ion thruster-propelled spacecraft to reach the asteroid and there was some uncertainty as to whether the probe had been captured by the asteroid's gravity at all. But after a long period of waiting, mission managers received the signal after Dawn was able to orientate its antenna toward Earth." -
James Webb Space Telescope Closer To the Axe
astroengine writes "This could be considered 'strike two' for the deeply troubled James Webb Space Telescope (JWST). Last week, the House Commerce, Justice, and Science Appropriations Subcommittee made the recommendation that the advanced infrared space telescope be cancelled. On Wednesday, the full House Science, Space and Technology Committee has approved the subcommittee's plan. The project may not be dead yet — the 2012 budget still has to be voted on my the House and Senate — but it sure is looking grim for 'Hubble's replacement.'" -
Red Wine Counters Some Negative Health Effects of Microgravity
astroengine writes "Great news for astronaut red wine aficionados: the alcoholic beverage can counteract some of the most troublesome physiological effects of microgravity. Unfortunately (or fortunately, depending on whether or not you have to pilot a spaceship), you have to drink a lot of wine to reap any benefit. These findings are fresh from the labs of French researchers (abstract) who found that by dosing unfortunate rats — hung by their tails to simulate microgravity — with resveratrol (a compound found in red wine), they could help stave off bone density loss and muscle atrophy. Does this mean resveratrol is an astronaut's best friend? Possibly, but judging by the quantities that are needed, it would most likely come in supplement form, rather than 750 ml bottles." -
First Photos of Asteroid 2011 MD
astroengine writes "At around 1 p.m. EDT on Monday, asteroid 2011 MD narrowly missed Earth's atmosphere, passing well within the orbits of our GPS satellites. Scientists worked hard to track the space rock, and astronomers using the 2-meter Faulkes Telescope in Siding Spring, Australia, managed to image the asteroid. Also, Planetary Science Institute research scientist Pasquale Tricarico put together some pretty cool asteroid-eye-view animations of the event." -
First Photos of Asteroid 2011 MD
astroengine writes "At around 1 p.m. EDT on Monday, asteroid 2011 MD narrowly missed Earth's atmosphere, passing well within the orbits of our GPS satellites. Scientists worked hard to track the space rock, and astronomers using the 2-meter Faulkes Telescope in Siding Spring, Australia, managed to image the asteroid. Also, Planetary Science Institute research scientist Pasquale Tricarico put together some pretty cool asteroid-eye-view animations of the event." -
Dying Star Betelgeuse Spews Fiery Nebula
astroengine writes "Betelgeuse is dying a nasty death. The star is in the final, violent stages of its life, shedding vast amounts of stellar material into space as it quickly approaches a supernova demise. But now, with the help of the European Southern Observatory's Very Large Telescope, Betelgeuse's extended nebula has come to light. Comprised of silica and alumina dust, ESO astronomers have been able to image the nebula in infrared wavelengths for the first time. This is the most detailed view we've ever had of the imminent death of a titanic red supergiant star." -
Homemade 'Mars In a Bottle' Tortures Bacteria
astroengine writes "The only time we've ever directly looked for life on Mars was during the 1970s, when NASA's Viking landers attempted to make direct measurements of Martian microbes metabolizing. Even today, the results of these groundbreaking experiments are hotly debated. Although the Viking experiments were often considered premature, a team of scientists hope to refine the next life-searching experiment to be sent to the Red Planet by building a Mars habitat on Earth. Imagine a Mars environment 'goldfish bowl' complete with UV radiation, dust, chilly temperatures, and an extremely low atmospheric pressure. So what have they done with this micro-Mars environment? They've been torturing various terrestrial microbes to see how they enjoy stints on the Martian surface. Their results have shown that even Earth microorganisms have a trick or two up their sleeves to survive in this alien environment." -
Research Suggests Tobacco Companies Add Weight Loss Drugs
smitty777 writes "According to an article from the European Journal of Public Health, the tobacco companies have been implicated in adding a number of drugs to tobacco products (PDF) to enhance their weight-reducing properties. Discovery News explains the neurological process for appetite suppression, which involves activating pro-opiomelanocortin cells in the hypothalamus." -
Twitter Helps Astronomers Zero-In On M51 Supernova
astroengine writes "A tweet about last week's M51 (the 'Whirlpool Galaxy') 14-magnitude bright stellar explosion was picked up by University of California, Berkeley, astronomers... who just so happened to be enjoying some observing time on one of Keck Observatory's monster telescopes. Although the weather wasn't perfect, the Berkeley team were able to quickly observe a spectrum from the M51 brightening to quickly confirm that it was a Type II supernova — the core collapse of a massive star, some 8 times the mass of the sun. 'This is the first time that we've been alerted via a tweet,' Alex Filippenko, lead astronomer of the UC Berkeley team, told Discovery News." -
Historic Pairing: Shuttle Docked To the ISS
astroengine writes "It's been imaged in artists' renderings, but never before in actual photos: the sight of a space shuttle berthed at the International Space Station. This view of shuttle Endeavour, taken by Italian astronaut Paulo Nespoli from aboard a Russian Soyuz capsule on May 23, is the culmination of 36 space shuttle missions to build the outpost over the past 12 years. NASA wanted the shot before it retires the shuttle fleet after one final mission in July." -
Project Icarus: the Gas Mines of Uranus
astroengine writes "When considering the fuel source for a fusion-powered interstellar probe, wouldn't it be a good idea to set up a colony on the moon and start pillaging the lunar surface for its helium-3 riches? Not so fast, says Adam Crowl of Project Icarus, there may be a far more viable source. What about the gas giants? Although Jupiter's gravity could pose a problem and Saturn's rings might get in the way (and forget Neptune, that place is one hell of a commute), perhaps the helium-3 in the Uranian atmosphere could be mined using atmospheric balloons?" -
Does Quantum Theory Explain Consciousness?
astroengine writes "Quantum theory is often seen as the root cause of unrelated, mysterious phenomena. Take consciousness for example. British physicist Roger Penrose recently argued 'that we will need to invoke 'new physics and exotic biological structures': rewriting quantum theory to make sense of consciousness.' But why do this, especially as there is no apparent causal link between quantum mechanics and the conscious mind? There appears to be a very basic logical fallacy here that even the most prominent physicists seem to be making." -
Worm Descendants From Columbia Disaster Relaunched
astroengine writes "In 2003, Space Shuttle Columbia burned up on reentry, killing all seven astronauts on board. However, from the wreckage, a sample of C. elegans worms survived. On Monday, descendants from the worms that survived the disaster were launched on board Endeavour for experiments on the space station. 'C. elegans is a common, well-studied organism used in biomedical research as a model for human development, genetics, aging and disease,' says NASA. 'The organism shares many essential biological characteristics found in human biology.'" -
Let Quantum Physics Officiate Your Wedding
disco_tracy writes "Conceptual artist Jonathon Keats has come up with the ultimate in a nondenominational wedding ceremony: quantum entanglement. From the article: 'Keats has designed an entangling apparatus, which, when situated in a sunny window and exposed to the full spectrum of solar radiation, divides pairs of entangled photons and translates them to the bodies of a nearby couple.' As unusual as it seems, the ceremony is serious business to Keats, who says, 'The quantum marriage will literally be broken up by skepticism about it.'" -
NASA Banned From Working With China
astroengine writes "In the wake of the Chinese cyber-threat and claims of espionage, a clause included in the US spending bill approved by Congress to avert a government shutdown a few weeks ago has prohibited NASA from coordinating any joint scientific activity with China. The clause also extends to the White House Office of Science and Technology Policy." -
Project Icarus: an Interstellar Mission Timeline
astroengine writes "What would the infrastructure supporting an interstellar mission look like? Considerations such as fuel sources, mining methods, interstellar spaceship construction activities and maintenance are being analyzed, all of which would be carried out before even reaching the ultimate interstellar goal. Project Icarus is currently unravelling the complexities of this operation and recently created a nifty animation of how one of the many fuel tanks may be recycled as communication relay pods en route to nearby stars." -
Project Icarus: an Interstellar Mission Timeline
astroengine writes "What would the infrastructure supporting an interstellar mission look like? Considerations such as fuel sources, mining methods, interstellar spaceship construction activities and maintenance are being analyzed, all of which would be carried out before even reaching the ultimate interstellar goal. Project Icarus is currently unravelling the complexities of this operation and recently created a nifty animation of how one of the many fuel tanks may be recycled as communication relay pods en route to nearby stars." -
Kepler May Uncover Numerous Ring Worlds
astroengine writes "According to a new publication, NASA's Kepler exoplanet-hunting space telescope may soon start discovering Saturn-like ringed alien worlds. So far, none have been positively identified, as Kepler has only detected exoplanets orbiting close to their parent stars; if these exoplanets have rings, they are most likely to have rings facing edge-on to their orbits, making them nearly impossible to detect. As more distant-orbiting exoplanets are detected, there's more likelihood ringed worlds will be tilted, allowing Kepler to see them." -
One-Way Sound Walls Proven Possible
disco_tracy writes "Imagine a room where a band is playing. Neighbors can't hear the music, but if someone outside the room is talking, the musicians can hear it. The concept — a kind of one-way mirror for sound — seems imaginary, but two Italian scientists recently pushed this kind of sound manipulating technology closer to reality (abstract)." -
Did Some Black Holes Survive the Big Bang?
astroengine writes "Could anything survive from one universe to the next, through a Big Crunch and resulting Big Bang? According to two researchers, a special class of pre-Big Bang black hole may have the ability to traverse the Big Bang singularity. The upshot is that there may be black holes that existed before the Big Bang knocking around in our modern universe. What's more, we might be able to detect them through the theorized gamma-ray burst produced when these pre-Big Bang black holes evaporate out of existence. But how would we distinguish between these black holes and the primordial black holes thought to be produced after the Big Bang? Well, that's just too confusing right now." -
Comet Hale-Bopp 'Frozen To Death'
astroengine writes "In 1997, comet Hale-Bopp became the most spectacular space event of the past few decades. But where's the huge lump of ice now? Astronomers have decided to check in on the interplanetary interloper to see how its journey is going after sweeping through the inner solar system 15 years ago. Now beyond the orbit of Neptune, Hale-Bopp has undergone a dramatic change. As it travels further from the sun, inevitably its surface receives less heat, and now the comet appears to have reached a watershed: it has ceased all cometary activity, in stark contrast to only 3 years ago. The next time it will erupt to life will be in around 2,500 years when it completes its next solar flyby." -
Submarine Tech Reaches For Deep Ocean Record
disco_tracy writes "US Submarines CEO Bruce Jones and his team have just announced that they've developed new technology for a submersible that could take ocean explorers 36,000 feet deep, to the bottom of the Pacific's Mariana Trench." -
The Space Station As a Simulated Mars Mission?
astroengine writes "NASA is looking at using the International Space Station as a testbed for a human mission to Mars, beginning with a planned week-long simulation to be staged next summer. Preliminary tests would involve working on systems that give astronauts more autonomy, perhaps culminating in a full mission analog, sealing a crew inside a separate module of the station with minimal interaction with the rest of the station and mission control. 'We want to use the space station as a way to get smarter about what a mission to Mars or a mission to an asteroid might look like,' space station flight controller Pete Hasbrook told Discovery News." -
What Happens If You Get Sucked Out of a Plane?
astroengine writes "We've all wondered about it. When flying at 30,000ft, you look around the cramped economy class cabin thinking 'I wonder if I'd survive being sucked out of this plane if a hole, say, just opened above my head?' That's probably around the time that you should fasten your seat belt. According to medical experts interviewed by Discovery News in the wake of the Southwest Airlines gaping hole incident, the rapid depressurization, low oxygen levels and freezing cold would render you unconscious very quickly. Assuming you don't get chopped in half as you exit through the hole and hit the tail, you'd be long dead before you hit the ground. Nice." -
Using Fusion To Propel an Interstellar Probe
astroengine writes "We've heard of nuclear pulse propulsion being the ideal way to travel through interstellar space, but what would such a system look like? In the 1970's, the British Interstellar Society's (BIS) Project Daedalus was conceived to fire pellets of fusion fuel out the rear of an interstellar space probe that were ignited using a powerful laser system. The 'pulsed inertial confinement fusion' wouldn't be 'vastly different from a conventional internal combustion engine, where small droplets of gasoline are injected into a combustion chamber and ignited,' says Richard Obousy, Project Leader and Co-Founder of Project Icarus. Now, building on the knowledge of Daedalus, the researchers of Project Icarus have prepared a nifty animation of a fusion pulse propulsion system in operation on the original Daedalus vehicle." -
Using Fusion To Propel an Interstellar Probe
astroengine writes "We've heard of nuclear pulse propulsion being the ideal way to travel through interstellar space, but what would such a system look like? In the 1970's, the British Interstellar Society's (BIS) Project Daedalus was conceived to fire pellets of fusion fuel out the rear of an interstellar space probe that were ignited using a powerful laser system. The 'pulsed inertial confinement fusion' wouldn't be 'vastly different from a conventional internal combustion engine, where small droplets of gasoline are injected into a combustion chamber and ignited,' says Richard Obousy, Project Leader and Co-Founder of Project Icarus. Now, building on the knowledge of Daedalus, the researchers of Project Icarus have prepared a nifty animation of a fusion pulse propulsion system in operation on the original Daedalus vehicle." -
Case Closed On Jerusalem UFO Video
astroengine writes "Skepticism was high after videos surfaced earlier this year depicting a UFO over Jerusalem. However, ufologists defended the sighting, dismissing claims that it was a hoax. But a few days ago, the Mutual UFO Network (MUFON), one of the oldest, largest, and most respected UFO investigation organizations in the world, announced their findings about the Jerusalem UFO. Yes, even MUFON has concluded it was a hoax." -
Mars Rover Down? Spirit Stays Silent
astroengine writes "One year after NASA's Mars Exploration Rover Spirit stopped communicating with Earth, mission managers have announced that they will give the stranded rover one more month to send a signal before they scale back the search. But things aren't looking good. In the words of JPL-based Mars rover driver Scott Maxwell, 'Spirit was so close to us, just a year ago. Snap your fingers, and she's a hundred million miles distant and we can't even prove she's alive.'" -
Was the Early Universe 2 Dimensional Spacetime?
astroengine writes "According to two theoretical physicists, our current four-dimensional Universe (3 dimensions of space, 1 dimension of time) is actually an evolution from a lower-dimensional state. The early Universe may have existed with just one spatial dimension (plus one time dimension) up until the Universe cooled below an energy state of 100 TeV. At this point, a transition occurred when the spatial dimension "folded" to create 2 dimensions. At 1 TeV, it folded again to create the Universe we know today: 3 dimensions of space, one of time. This may sound like a purely theoretical study, but there might be evidence of the evolution of universal dimensions in cosmic ray measurements and, potentially, in gravitational wave cut-off frequency." -
Brown Dwarf Hits Record Low
astroengine writes "The Keck II infrared telescope on Mauna Kea, Hawaii, has spotted what appears to be the coldest brown dwarf ever detected. Astronomers from the University of Hawaii have managed to constrain its temperature to just shy of 100 degrees Celsius. The object is part of a brown dwarf binary system and is estimated to be 6-15 times the mass of Jupiter. This is an exciting object as it could belong to a so-far theoretical 'Y' class of brown dwarf, a classification that makes objects like this cool example more planet-like than star-like." -
Stellar Wormholes May Exist
seagirlreed writes "Pairs of stars could be connected via wormholes filled with 'phantom matter,' according to Kyrgyz researchers. If a wormhole exists within a star, the stellar body may exhibit measurable properties astronomers might detect. Although interesting, other scientists are skeptical, pointing out that this is highly speculative research." -
Stellar Wormholes May Exist
seagirlreed writes "Pairs of stars could be connected via wormholes filled with 'phantom matter,' according to Kyrgyz researchers. If a wormhole exists within a star, the stellar body may exhibit measurable properties astronomers might detect. Although interesting, other scientists are skeptical, pointing out that this is highly speculative research." -
Aussie Brewery Creates Space Beer
astroengine writes "An Australian brewing company has created the world's first beer that can be consumed in space. 4-Pines Brewing Company teamed up with Saber Astronautics Australia, tirelessly testing different brews on zero-G flights last year. They have now finalized the winning formula, calling the beer 'Vostok' — after the spacecraft flown by Yuri Gagarin in 1961. The beverage is a strong-tasting stout with reduced carbonation to avoid the dreaded microgravity 'wet burp.'" -
Tiny Transistors Could Be Used To Track Cash
disco_tracy writes "Banks have long considered placing silicon transistors on currency for security purposes, but the technology was too chunky and intensive for paper bills. Now, tiny low-power organic transistors developed by German scientists could make it possible to really follow the money." -
Nautilus-X: the Space Station With Rockets
astroengine writes "So we have a space station, now what? We've heard some rather outlandish ideas, but this is one concept a research group in NASA is taking seriously. By retrofitting the ISS with rockets, Nautilus-X will act as an interplanetary space station of sorts, including room for 6 astronauts, an artificial gravity ring, inflatable habitats and docking for exploration spaceships. When can we take a luxury cruise to Mars? 2020 by the project's estimate. It all sounds very 2001, but the projected costs of retrofitting the space station seem a little on the low side." -
The Outfall of a Helium-3 Crisis
astroengine writes "The United States is currently recovering from a helium isotope crisis that last year sent low-temperature physicists scrambling, sky-rocketed the cost of hospital MRI's, and threw national security staff out on a search mission for alternate ways to detect dirty bombs. Now the panic is subsiding, what is being done to conserve, or replace, helium-3?" -
Milky Way Stuffed With an Estimated 50 Billion Alien Worlds
astroengine writes "Using data extrapolated from the early Kepler observations of 1,235 candidate exoplanets, mission scientists have placed an estimate on the number of alien worlds there are in our galaxy. There are thought to be 50 billion exoplanets, 500 million of which are probably orbiting within their stars' habitable zones." -
Sizing Up the Daedalus Interstellar Spacecraft
astroengine writes "How big would an interstellar spaceship need to be? New artwork of the British Interplanetary Society's 1970's Project Daedalus by the non-profit organization Tau Zero Foundation gives the impression that the fuel economy for a nuclear pulse propelled vehicle might be a bit steep." -
Betelgeuse To Blow Up Soon — Or Not
rubycodez writes "A wave of 2012-related hoopla has hit the internet about the star that makes the 'right shoulder' of Orion the hunter: Betelgeuse. Astronomer Phil Plait once again puts rumors to rest. The star will indeed explode as a type II supernova, and when it does it will be brighter than Venus when viewed from Earth, though not as bright as the full moon. It will be visible in the night sky for weeks, and could be visible in the day sky for a short time. But that event could happen today or 100,000 years from now, or as much as a million years from now. Since Betelgeuse is over 600 light-years away, its violent death will not harm Earth in any way, but will definitely provide a huge bonanza of scientific information about supernovae. As geeks, we can only hope the core of Betelgeuse undergoes catastrophic failure in our lifetime." -
The Moon Has a Fluid Outer Core
mapkinase writes with this excerpt from Discovery News: "The Apollo Passive Seismic Experiment recorded motions of the ground from moonquakes and other activities generating sound waves until late 1977. The network was too limited to directly monitor waves bouncing off or scattered by the moon's core, leaving scientists dependent on more indirect techniques, such as measuring minute gravitational changes, to craft a picture of the moon's interior. Those models turned out to be pretty accurate, says lead scientist Renee Weber, with NASA's Marshall Space Flight Center in Huntsville, Ala. The new research confirms the existence of a solid inner core and liquid outer layer, similar to Earth's. Unlike Earth, the moon also has a partly melted, mushy layer over that." -
Solar Panels For Your Pants
Phoghat writes "A new line of clothes come with its own solar panels to charge small electronics in your pocket. It might be overdoing the 'Green' technology but for the low, low price of $920, you can own a pair of Go Urban Cargo Pants, which boasts 'fly front, low-slung drawstring waist, and two back patch pockets with button down flaps,' but the main reason you might want them is the: "'two side cargo pockets with independently functioning power supply.'" -
New Zealand Government Opens UFO Files
astroengine writes "Following hot on the heels of a series of international UFO sighting disclosures, the New Zealand government has joined the party and made public 2,000 pages of UFO eyewitness accounts dating back to 1952. Helpfully, the NZ newspaper The Dominion Post has scanned the documents and has made them available online. Among the accounts of alien encounters and strange lights in the sky is one of New Zealand's most famous UFO mystery: the Kaikoura sighting. But was it aliens? Probably not, but it makes for an entertaining read." -
Australia's Outback Could Get Web Via TV Antenna
disco_tracy writes "Australia began switching off its analog TV signals in June and the transition to digital-only transmission is expected to be complete by the end of 2013, five years before the roll out finishes for the NBN. The leftover analog spectrum could be used to deliver Internet to people living in remote areas. Unlike 3G networks, which lose download speed with more users, the analog signal would provide a consistent speed no matter how many users there were." -
Extra-Galactic Planet Discovered In Milky Way
astroengine writes "Between six to nine billion years ago, the Milky Way collided with another galaxy. As you'd expect, this caused quite a mess; stars, dust and gas being ripped from the intergalactic interloper. In fact, to this day, the dust hasn't quite settled and astronomers have spotted an odd-looking exoplanet orbiting a metal-poor star 2,000 light-years from Earth. Through a careful process of elimination, the extrasolar planet (known as HIP 13044b) actually works out to be an extragalactic planet, a surviving relic of the massive collision eons ago." -
Most Detailed View of Dark Matter Mapped By Hubble
astroengine writes "Building on previous studies by the Hubble Space Telescope, new analysis of gravitational lensing data has revealed the most detailed map of the distribution of dark matter yet. The distribution appears as a beautiful ghost-like or ethereal haze and could have serious ramifications on our understanding as to how galaxy clusters form and evolve." -
Hayabusa Captured Asteroid Dust Confirmed
astroengine writes "It's been a seven-year roller-coaster ride for the asteroid sample return mission, but JAXA — the Japanese space agency — has confirmed that 1,500 particles of dust from the surface of asteroid Itokawa have been found inside the sample return capsule. The capsule parachuted to Earth shortly before the Hayabusa spacecraft reentered over the Australian Outback in June. Since then, scientists have been painstakingly analyzing the capsule's contents to make sure the dust they found wasn't terrestrial contamination. Now they are sure, making this the first time a sample has been collected from the surface of an asteroid (and only the second time a sample has been returned from a celestial object, the first being the Moon missions)." -
Aerial Drone To Hunt For Life On Mars
astroengine writes "What if the Martian terrain is too rugged for a rover to traverse? How do we study surface features that are too small for an orbiter to resolve? If selected by NASA, the Aerial Regional-Scale Environment Surveyor (ARES) could soar high above the Martian landscape, getting a unique birds-eye view of the Red Planet. Its primary mission is to sniff out potential microbial-life-generating gases like methane, but it would also be an ideal reconnaissance vehicle to find future landing sites for a manned expedition. Prototypes of the rocket-powered drone have been successfully flown here on Earth, so will we see ARES on Mars any time soon?"
