Asteroid From Another Star System Found Orbiting Wrong Way Near Jupiter ( 59

Astronomers have spotted an asteroid orbiting our sun in the opposite (retrograde) direction to the planets. The 2-mile-wide asteroid, known as 2015 BZ509, is the first "interstellar immigrant" from beyond our solar system to remain, according to the study published in the journal Monthly Notices of the Royal Astronomical Society. The Guardian reports: Further work on the asteroid revealed it takes the same length of time to orbit the sun as the planet Jupiter at a similar average distance, although in the opposite direction and with a different shaped path, suggesting the two have gravitational interactions. But unpicking quite where the asteroid came from was challenging. Asteroids that orbit the sun on paths that take them between the giant planets -- Jupiter, Saturn, Uranus and Neptune -- are known as centaurs, and it is thought that many might come from distant bands of material within the solar system such as the scattered disk or the Oort cloud. Several, like BZ509, are known to have retrograde paths, although how they ended up on such orbits is unclear.

But there was a clue there was something unusual about BZ509: while previous studies suggested retrograde centaurs stay gravitationally "tied" to planets for 10,000 years at most, recent work had suggested this asteroid's orbit had been linked to Jupiter for far longer, probably as a result of the planet's mass and the way both take the same time to orbit the sun. The discovery provides vital clues as to the asteroid's origins. [Dr Fathi Namouni from the Observatory de la Cote d'Azur said] that the model suggests the most likely explanation is that the asteroid was captured by Jupiter as it hurtled through the solar system from interstellar space. "It means it is an alien to the solar system," he said.


German Test Reveals That Magnetic Fields Are Pushing the EM Drive ( 179

"Researchers in Germany have performed an independent, controlled test of the infamous EM Drive with an unprecedented level of precision," writes PvtVoid. "The result? The thrust is coming from interactions with the Earth's magnetic field." From the report: Instead of getting ahold of someone else's EM drive, or Mach-effect device, the researchers created their own, along with the driving electronics. The researchers used precision machining and polishing to obtain a microwave cavity that was much better than those previously published. If anything was going to work, this would be the one. The researchers built up a very nice driving circuit that was capable of supplying 50W of power to the cavity. However, the amplifier mountings still needed to be worked on. So, to keep thermal management problems under control, they limited themselves to a couple of Watts in the current tests. The researchers also inserted an enormous attenuator. This meant that they could, without physically changing the setup, switch on all the electronics and have the amplifiers working at full noise, and all the power would either go to the EM drive or be absorbed in the attenuator. That gives them much more freedom to determine if the thrust was coming from the drive or not.

Even with a power of just a couple of Watts, the EM-drive generates thrust in the expected direction (e.g., the torsion bar twists in the right direction). If you reverse the direction of the thruster, the balance swings back the other way: the thrust is reversed. Unfortunately, the EM drive also generates the thrust when the thruster is directed so that it cannot produce a torque on the balance (e.g., the null test also produces thrust). And likewise, that "thrust" reverses when you reverse the direction of the thruster. The best part is that the results are the same when the attenuator is put into the circuit. In this case, there is basically no radiation in the microwave cavity, yet the WTF-thruster thrusts on. So, where does the force come from? The Earth's magnetic field, most likely. The cables that carry the current to the microwave amplifier run along the arm of the torsion bar. Although the cable is shielded, it is not perfect (because the researchers did not have enough mu metal). The current in the cable experiences a force due to the Earth's magnetic field that is precisely perpendicular to the torsion bar. And, depending on the orientation of the thruster, the direction of the current will reverse and the force will reverse.
The researchers' conclude by saying: "At least, SpaceDrive [the name of the test setup] is an excellent educational project by developing highly demanding test setups, evaluating theoretical models and possible experimental errors. It's a great learning experience with the possibility to find something that can drive space exploration into its next generation."

A New World's Extraordinary Orbit Points to Planet Nine ( 79

In early 2016, two planetary scientists declared that a ghost planet is hiding in the depths of the solar system, well beyond the orbit of Pluto. Their claim, which they made based on the curious orbits of distant icy worlds, quickly sparked a race to find this so-called Planet Nine -- a planet that is estimated to be about 10 times the mass of Earth. From a report: Now, astronomers are reporting that they have spotted another distant world -- perhaps as large as a dwarf planet -- whose orbit is so odd that it is likely to have been shepherded by Planet Nine. The object confirms a specific prediction made by Konstantin Batygin and Michael Brown, the astronomers at the California Institute of Technology who first argued for Planet Nine's existence. "It's not proof that Planet Nine exists," said David Gerdes, an astronomer at the University of Michigan and a co-author on the new paper. "But I would say the presence of an object like this in our solar system bolsters the case for Planet Nine."

Gerdes and his colleagues spotted the new object in data from the Dark Energy Survey, a project that probes the acceleration in the expansion of the universe by surveying a region well above the plane of the solar system. This makes it an unlikely tool for finding objects inside the solar system, since they mostly orbit within the plane. But that is exactly what makes the new object unique: Its orbit is tilted 54 degrees with respect to the plane of the solar system. It's something Gerdes did not expect to see. Batygin and Brown, however, predicted it.
The rocky body is being described as 2015 BP519. Quanta magazine has more details.

Human Race Just 0.01% of All Life But Has Destroyed 83% of Wild Mammals, Study Finds ( 177

An assessment of all life on Earth has revealed humanity's surprisingly tiny part in it as well as our disproportionate impact. From a report: The world's 7.6 billion people represent just 0.01% of all living things, according to the study. Yet since the dawn of civilisation, humanity has caused the loss of 83% of all wild mammals and half of plants, while livestock kept by humans abounds. The new work is the first comprehensive estimate of the weight of every class of living creature and overturns some long-held assumptions. Bacteria are indeed a major life form -- 13% of everything -- but plants overshadow everything, representing 82% of all living matter. All other creatures, from insects to fungi, to fish and animals, make up just 5% of the world's biomass.

Another surprise is that the teeming life revealed in the oceans by the recent BBC television series Blue Planet II turns out to represent just 1% of all biomass. The vast majority of life is land-based and a large chunk -- an eighth -- is bacteria buried deep below the surface. "I was shocked to find there wasn't already a comprehensive, holistic estimate of all the different components of biomass," said Prof Ron Milo, at the Weizmann Institute of Science in Israel, who led the work, published in the Proceedings of the National Academy of Sciences.


China Launches Satellite To Explore Dark Side of Moon ( 103

China launched a relay satellite early on Monday designed to establish a communication link between earth and a planned lunar probe that will explore the dark side of the moon, the official Xinhua news agency said. From a report: Citing the China National Space Administration, Xinhua said the satellite was launched at 5:28 a.m. (2128 GMT Sunday) on a Long March-4C rocket from the Xichang launch center in the southwest of the country. "The launch is a key step for China to realize its goal of being the first country to send a probe to soft-land on and rove the far side of the moon," Xinhua quoted Zhang Lihua, manager of the relay satellite project, as saying.

Did Octopuses Come From Outer Space? 242

A scientific paper, originally published in March, from peer-reviewed journal Progress in Biophysics and Molecular Biology has found its way in this week's news-cycle. The paper, which is co-written by 33 authors including molecular immunologist Edward Steele and astrobiologist Chandra Wickramasinghe, suggests that octopuses could be aliens, adding legitimacy to a belief, which otherwise has been debunked several times in the recent years.

An excerpt from the paper, which makes the bold claim: The genetic divergence of Octopus from its ancestral coleoid sub-class is very great ... Its large brain and sophisticated nervous system, camera-like eyes, flexible bodies, instantaneous camouflage via the ability to switch color and shape are just a few of the striking features that appear suddenly on the evolutionary scene. [...] It is plausible then to suggest they [octopuses] seem to be borrowed from a far distant 'future' in terms of terrestrial evolution, or more realistically from the cosmos at large."Ephrat Livni of Quartz questions the basis of the finding: To make matters even more strange, the paper posits that octopuses could have arrived on Earth in "an already coherent group of functioning genes within (say) cryopreserved and matrix protected fertilized octopus eggs." And these eggs might have "arrived in icy bolides several hundred million years ago." The authors admit, though, that "such an extraterrestrial origin...of course, runs counter to the prevailing dominant paradigm." Indeed, few in the scientific community would agree that octopuses come from outer space. But the paper is not just about the provenance of cephalopods. Its proposal that octopuses could be extraterrestrials is just a small part of a much more extensive discussion of a theory called "panspermia," which has its roots in the ideas of ancient Greece. Newsweek spoke with Avi Loeb, the Frank B. Baird Jr. Professor of Science at Harvard University, who told the publication that the paper has raised "an interesting but controversial possibility." However, he added, that it offers no "indisputable proof" that the Cambrian explosion is the result of panspermia.

Further reading: Cosmos magazine has outlined some flaws in the assumptions that the authors made in the paper. It has also looked into the background of some of the authors. The magazine also points out that though the paper has made bold claims, it has yet to find support or corroboration from the scientific community. News outlet Live Science has also questioned the findings.

Estonia To Become the World's First Free Public Transport Nation ( 139

On July 1st, the country of Estonia will create the largest 24/7 free public transit zone in the world, making it feasibly possible to travel by bus from one end of the 1.3 million-strong Baltic nation to the other without paying a cent. CityLab reports: Estonia is already a world leader in free public transit: In 2013, all public transit in its capital, Tallinn, became free to local residents (but not tourists or other visitors, even those from other parts of the country). The new national free-ride scheme with extend this model even further, making all state-run bus travel in rural municipalities free and extending cost-free transit out from the capital into other regions. The plan will not, however, extend Tallinn's existing free public transit policies to other Estonian cities, and it also won't make riding Tallinn transit free to visitors (at least, not initially). So while most of the country's land area and population -- which is overwhelmingly concentrated around Tallinn -- should get fare-free daily lives, it's not precisely the case that no Estonian will ever buy a bus ticket in their own country again. Further reading: Pop-Up City

Anti-GMO Activists Slow Scientists Breeding a CO2-Reducing Superplant ( 197

The Bulletin of Atomic Scientists calls it "a plant that could save civilization, if we let it." Slashdot reader meckdevil writes: A "super chickpea plant" now in development could remove huge amounts of excess atmospheric carbon dioxide and fix it in the soil, greatly diminishing the impacts of climate change (not to mention producing large amounts of tasty hummus). But fear of anti-GMO activists has so far deterred her from using the CRISPR gene-editing tool to speed work on the plant.
The effort is led by Joanne Chory, director of the Plant Molecular and Cellular Biology laboratory at the Salk Institute for Biological Sciences -- who according to the article will make much slower progress without CRISPR. "Even with advanced breeding techniques, Chory estimates that developing a super plant in this fashion would take around 10 years..."

"She estimates that if 5 percent of the world's cropland, approximately the total area of Egypt, were devoted to such super plants, they could capture about 50 percent of current global carbon dioxide emissions."

Astronomers Discovered the Fastest-Growing Black Hole Ever Seen ( 69

Long-time Slashdot reader Yhcrana shares "some good old fashioned astronomy news." Astronomers have discovered "a black hole 20 billion times the mass of the sun eating the equivalent of a star every two days," reports the New York Times. The black hole is growing so rapidly, said Christian Wolf, of the Australian National University, who led the team that found it in the depths of time, "that it is probably 10,000 times brighter than the galaxy it lives in." So bright, that it is dazzling our view and we can't see the galaxy itself. He and his colleagues announced the discovery in a paper to be published in the Publications of the Astronomical Society of Australia...

The blaze from material swirling around this newly observed drainpipe into eternity -- known officially as SMSS J215728.21-360215.1 -- is as luminous as 700 trillion suns, according to Wolf and his collaborators. If it were at the center of our own galaxy, the Milky Way, it would be 10 times brighter than the moon and bathe the Earth in so many X-rays that life would be impossible. Luckily it's not anywhere nearby. It is in fact 12 billion light years away, which means it took that long for its light to reach us, so we are glimpsing this cataclysm as it appeared at the dawn of time, only 2 billion years after the Big Bang, when stars and galaxies were furiously forming.


Floating Pacific Island Is In the Works With Its Own Government, Cryptocurrency ( 168

An anonymous reader quotes a report from CNBC: Nathalie Mezza-Garcia is a political scientist turned "seavangelesse" -- her term for an evangelist in favor of living off the grid -- and on the ocean. Mezza-Garcia spoke with CNBC's Matthew Taylor about what she sees as the trouble with governments, and why she believes tech startups should head to Tahiti. This seavangelesse is a researcher for the Blue Frontiers and Seasteading Institute's highly-anticipated Floating Island Project. The project is a pilot program in partnership with the government of French Polynesia, which will see 300 homes built on an island that runs under its own governance, using a cryptocurrency called Varyon.

"Once we can see how this first island works, we will have a proof of concept to plan for islands to house climate refugees," she said. The project is funded through philanthropic donations via the Seasteading Institute and Blue Frontiers, which sells tokens of the cryptocurrency Varyon. The pilot island is expected to be completed by 2022 and cost up to $50 million. As well as offering a home for the displaced, the self-contained islands are designed to function as business centers that are beyond the influence of government regulation.


US Government Wants To Start Charging For Landsat, the Best Free Satellite Data On Earth ( 239

The U.S. government may begin charging users for access to five decades of satellite images of Earth. Quartz reports: Nature reports that the Department of Interior has asked an advisory board to consider the consequences of charging for the data generated by the Landsat program, which is the largest continuously collected set of Earth images taken in space and has been freely available to the public since 2008. Since 1972, Landsat has used eight different satellites to gather images of the Earth, with a ninth currently slated for a December 2020 launch. The data are widely used by government agencies, and since it became free, by an increasing number of academics, private companies and journalists. "As of March 31, 2018, more than 75 million Landsat scenes have been downloaded from the USGS-managed archive!" the agency noted on the 10th anniversary of the program.

Now, the government says the cost of sharing the data has grown as more people access it. Advocates for open data say the public benefit produced through research and business activity far outweigh those costs. A 2013 survey cited by Nature found that the dataset generated $2 billion in economic activity, compared to an $80 million budget for the program.


Kilauea Volcano Erupts On Hawaii's Big Island ( 56

An anonymous reader quotes a report from The New York Times: The Kilauea volcano erupted from its summit on Thursday morning (Warning: source may be paywalled; alternative source), spewing an ash plume that reached 30,000 feet above the island of Hawaii, the authorities said. The eruption was the most forceful new explosion so far at Kilauea, one of the world's most active volcanoes. Kilauea has already been triggering small earthquakes, creating gas-emitting fissures and releasing flows of lava that have destroyed dozens of homes this month. The Hawaiian Volcano Observatory issued a "code red" warning that additional activity could be expected. "At any time, activity may again become more explosive, increasing the intensity of ash production and producing ballistic projectiles near the vent," the observatory said. But Dr. Michelle Coombs of the United States Geological Survey said that ash fall from the eruption, which occurred shortly after 4 a.m., was "pretty limited" to the area around Hawaii Volcanoes National Park. She emphasized that the new eruption wasn't the "big one" that some are fearing, drawing a contrast with the eruption in 1980 of Mount St. Helens in Washington State that killed 57 people.

Faster Flights Are Coming With New Satellite Tracking Technology ( 34

An anonymous reader shares a report: The company that provides the U.K.'s air-traffic control service is taking a 10 percent stake in Aireon, a U.S. firm that's building a satellite-based tracking system and will offer commercial services to controllers starting next year. Aireon plans to use a constellation of 66 Iridium Communications. Next satellites in low Earth orbit to track aircraft. Iridium has 50 in orbit already, 47 of which are operational. Each carries equipment to offer aircraft position data to ground controllers.

Iridium plans to launch five additional satellites on May 22 from California, completing its full network later this year. Aireon said 70 percent of the world's airspace lacks satellite tracking or airline surveillance coverage, including most oceans and parts of Africa and Latin America.


NASA's Atomic Fridge Will Make the ISS the Coldest Known Place in the Universe ( 98

An anonymous reader shares a report: Later this year, a small part of the International Space Station will become 10 billion times colder than the average temperature of the vacuum of space thanks to the Cold Atom Lab (CAL). Once it's on the space station, this atomic fridge will be the coldest known place in the universe and will allow physicists to 'see' into the quantum realm in a way that would never be possible on Earth.

In a normal room, "atoms are bouncing off one another in all directions at a few hundred meters per second," Rob Thompson, a NASA scientist working on CAL explained in a statement. CAL, however, can reach temperatures that are just one ten billionth of a degree above absolute zero -- the point at which matter loses all its thermal energy -- which means that this chaotic atomic motion comes to a near standstill.

CAL uses magnetic fields and lasers traps to capture the gaseous atoms and cool them to nearly absolute zero. Since all the atoms have the same energy levels at that point, these effectively motionless atoms condense into a state of quantum matter called a Bose-Einstein condensate. This state of matter means that the atoms have the properties of one continuous wave rather discrete particles.


NASA Says Humans Are Causing Massive Changes In Location of Water Around the World ( 99

Using measurements from Earth-observing satellites, NASA scientists have found that humans have dramatically altered the location of water around the world. "The team of researchers analyzed 14 years of data from NASA's twin GRACE satellites and studied regions that have seen large increases or decreases in the total amount of freshwater, including water in lakes and rivers and water stored in underground aquifers, soil, snow and ice," reports The Desert Sun. From the report: The scientists examined precipitation trends and other data to determine the most likely causes of these huge losses and gains of water around the world. Their findings in a new study reveal that of the 34 "hotspots" of water change in places from California to China, the trends in about two-thirds of those areas may be linked to climate change or human activities, such as excessive groundwater pumping in farming regions. In eight of the 34 regions, the researchers said the trends reflect "possible" or "probable" impacts of climate change, including losses of ice sheets in Greenland and Antarctica, precipitation increases in the high latitudes of Eurasia and North America, the retreat of Alaska's glaciers and melting ice fields in Patagonia.

They ascribed changes in 12 regions to natural variability, including a progression from a dry period to a wet period in the northern Great Plains, a drought in eastern Brazil and wetter periods in the Amazon and tropical West Africa. In 14 of the areas -- more than 40 percent of the hotspots -- the scientists associated the water shifts partially or largely with human activity. That included groundwater depletion combined with drought in Southern California and the southern High Plains from Kansas to the Texas Panhandle, as well as in the northern Middle East, northern Africa, southern Russia, Ukraine and Kazakhstan.
The first-of-its-kind study has been published in the journal Nature.

A Fleet of Sailing Robots Sets Out To Quantify the Oceans ( 76

pacopico writes: A start-up in California called Saildrone has built a fleet of robotic sailboats that are gathering tons of data about the oceans. The saildrones rely on a hard, carbon-fiber sail to catch wind, and solar panels to power all of their electronics and sensors. "Each drone carries at least $100,000 of electronics, batteries, and related gear," reports Businessweek. "Devices near the tip of the sail measure wind speed and direction, sunlight, air temperature and pressure, and humidity. Across the top of the drone's body, other electronics track wave height and period, carbon dioxide levels, and the strength of the Earth's magnetic field. Underwater, sensors monitor currents, dissolved oxygen levels, and water temperature, acidity, and salinity. Sonars and other acoustic instruments try to identify animal life." So far they've been used to find sharks, monitor fisheries, check on climate change and provide weather forecasts. Saildrone just raised $90 million to build a fleet of 1,000 drones, which it thinks will be enough to measure all of the world's oceans.

Moon of Jupiter Prime Candidate For Alien Life After Water Blast Found ( 133

A NASA probe that explored Jupiter's moon Europa flew through a giant plume of water vapour that erupted from the icy surface and reached a hundred miles high, according to a fresh analysis of the spacecraft's data. An anonymous reader shares a The Guardian report: The discovery has cemented the view among some scientists that the Jovian moon, one of four first spotted by the Italian astronomer Galileo Galilei in 1610, is the most promising place in the solar system to hunt for alien life. If such geysers are common on Europa, NASA and European Space Agency (ESA) missions that are already in the pipeline could fly through and look for signs of life in the brine, which comes from a vast subsurface ocean containing twice as much water as all the oceans on Earth.

NASA's Galileo spacecraft spent eight years in orbit around Jupiter and made its closest pass over Europa, a moon about the size of our own, on 16 December 1997. As the probe dropped beneath an altitude of 250 miles, its sensors twitched with unexpected signals that scientists were unable to explain at the time. Now, in a new study, the researchers describe how they went back to the Galileo data after grainy images beamed home from the Hubble space telescope in 2016 showed what appeared to be plumes of water blasting from Europa's surface.


Reporter Shares Experience of Visiting a Flat Earth Convention ( 356

Tom Usher, reporting for Vice: I arrived at the venue -- a Jurys Inn hotel -- on a wet Saturday morning, to discover that the event was essentially a small carpeted convention room boasting a few cameras, some stalls selling merchandise, and 70 or so attendees watching PowerPoint presentations beamed onto a wall. As I entered, I was offered a gift of "fluoride-free" toothpaste. This made perfect sense, given the location. A popular conspiracy theory states that governments across the world have been putting fluoride in our water supply to tranquilize the masses, despite the fact the only piece of "evidence" for this theory -- which involves both the Nazis and the Communists -- has been widely discredited. With the tone set for the day, I sat down to watch some speeches.

The speakers all seemed well aware of how "globe-earthers" view the idea of a flat Earth, i.e. ludicrous, and their talk of the current scientific establishment felt very "us versus them" -- a nice bit of truther tribalism. One speaker talked at length about the moon, and how its orbit proved the Earth couldn't be spherical, which seemed a little counterintuitive. Another talked about how the Egyptian pyramid structure points toward clues that the Earth is a flat diamond shape, supported by pillars. Between sounding off about the Vatican and the fact that the establishment has indoctrinated us to believe all sorts of things, including that the Earth is a sphere, a third speaker suggested that cancer is caused by negative emotions and argued that dinosaurs didn't exist.
The story also explores why some people still believe these long-debunked theories. Further reading: The bizarre tale of the flat-Earth convention that fell apart (CNET).

NASA Will Send Helicopter To Mars To Test Otherworldly Flight ( 103

NASA is sending a small, autonomous rotorcraft to Mars via the agency's Mars 2020 rover mission, currently scheduled to launch in July 2020. NASA says the goal of the mission is to "demonstrate the viability and potential of heavier-than-air vehicles on the Red Planet." BBC reports: Its design team spent more than four years shrinking a working helicopter to "the size of a softball" and cutting its weight to 1.8kg (4lbs). It is specifically designed to fly in the atmosphere of Mars, which is 100 times thinner than Earth's. NASA describes the helicopter as a "heavier-than-air" aircraft because the other type -- sometimes called an aerostat -- refers to aircraft like balloons and blimps. The helicopter's two blades will spin at close to 3,000 revolutions a minute, which NASA says is about 10 times faster than a standard helicopter on Earth.

Earth's 'Bigger, Older Cousin' Maybe Doesn't Even Exist ( 52

Ever since astronomers started to detect planets beyond our solar system, they've been trying to find another world just like Earth. And few years ago, they announced that they'd found a planet that was the closest match yet -- Kepler-452b. Trouble is, some astronomers now say it's not possible to know for sure that this planet actually exists. From a report: "There's new information that we can now quantify which tells us something that we didn't know before," says Fergal Mullally, who used to be an astronomer on the science team for NASA's Kepler Space Telescope. In 2015, NASA declared that Kepler-452b was the first near-Earth-sized planet orbiting in the "habitable" zone around a star very similar to our sun. The space agency called it Earth's "bigger, older cousin," and scientists were so enthusiastic that one began quoting poetry at a news conference. The original science wasn't shoddy, Mullally says. It's just that, since then, researchers have learned more about the telescope's imperfections.

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