For the out-of-band Slashdot experience (mostly headlines), follow us on Twitter, or Facebook. ×
Space

First Human Colonies Should Be Among Venus' Clouds 250 250

StartsWithABang writes: When we talk about humans existing on worlds other than Earth, the first choice of a planet to do so on is usually Mars, a world that may have been extremely Earth-like for the first billion years of our Solar System or so. Perhaps, with enough ingenuity and resources, we could terraform it to be more like Earth is today. But the most Earth-like conditions in the Solar System don't occur on the surface of Mars, but rather in the high altitudes of Venus' atmosphere, some 50-65 km up. Despite its harsh conditions, this may be the best location for the first human colonies, for a myriad of good, scientific reasons. NASA proposed something similar last year and released a report on the subject.
Space

Why Didn't Voyager Visit Pluto? 98 98

Flash Modin writes: NASA built the twin Voyager spacecraft for a rare planetary alignment that put Jupiter, Saturn, Uranus, and Neptune within reach at once. Originally, Voyager 1 was programmed to see Pluto in 1986, but managers targeted Saturn's planet-like moon Titan instead. That choice made Pluto impossible by vaulting Voyager 1 from the orbital plane. Interestingly, Voyager 2, which couldn't reach Pluto, made the case for New Horizons by revealing Neptune's moon Triton as a kidnapped Pluto. "I'm very glad that they chose not to go to Pluto in 1986," says New Horizons head Alan Stern. "We'll do a better job at Pluto with modern instruments than they would have, and they did a much better job at Saturn..."
NASA

Color Movie Made of Pluto-Charon System 41 41

VernonNemitz writes: Today NASA released a color movie of Pluto and its largest moon Charon, as the New Horizons probe approaches its July 2015 rendezvous date. "It's exciting to see Pluto and Charon in motion and in color," said New Horizons principal examiner Alan Stern of the Southwest Research Institute (SwRI) at Boulder, Colorado. "Even at this low resolution, we can see that Pluto and Charon have different colours - Pluto is beige-orange, while Charon is grey. Exactly why they are so different is the subject of debate," Stern said.
Moon

Russian Official Calls For "International Investigation" of the Apollo Program 307 307

MarkWhittington writes: According to a Tuesday article in the Moscow Times, a spokesman for Russia's Investigative Committee named Vladimir Markin suggested that an international investigation be mounted into some of the "various murky details surrounding the U.S. moon landings between 1969 and 1972." Markin would particularly like to know where some of the missing moon rocks went to and why the original footage of the Apollo 11 moon landing was erased. Markin hastened to add that he is, of course, not suggesting that NASA faked the moon landings and just filmed the events in a studio.
Moon

Astrobotic To Take Mexican Payload To the Moon 51 51

MarkWhittington writes: One of the great results of the commercial space revolution, which promises to lower the cost of space travel, is the opportunities it opens for countries and private entities to operate in space who would not otherwise be able to do so. The latest example of this phenomenon is the agreement by Astrobotic, one of the competitors in the Google Lunar X Prize, to take a yet to be determined payload provided by the Agencia Espacial Mexicana, according to a story in the Pittsburgh Post-Gazette. The arrangement will help Mexico become the first Latin American country to land and operate a payload on the lunar surface.
Space

Pluto's Outer Moons Orbit Chaotically, With Unpredictable Sunrises and Sunsets 92 92

StartsWithABang writes: Few things in this world are as regular as sunrise and sunset. With the application of a little physics, you can predict exactly where and when the sun will rise or set from any location on Earth. Thus far, every world in our Solar System — planet, moon and asteroid — has had the exact same experience as us. But out in the Kuiper belt, Pluto is different. The only known world in the Solar System where a significant fraction of the system's mass is not in a single component, the outer moons of the Pluto-Charon system provide a unique environment to study how planets might behave in orbit around binary stars. The amazing takeaway? The rotational part of the orbit is chaotic; the worlds tumble, and hence sunrises and sunsets are no longer predictable.
Space

Mystery Moon Swirls Caused By Blasts of Comet Gas? 11 11

astroengine writes: Strange bright swirls have long been known to exist on the moon's surface and their origin is steeped in mystery. Often stretching thousands of miles across the lunar landscape, scientists have tried to make connections with the elegant curved shapes with the moon's interior magnetism or interactions between moon dirt and the solar wind, but these explanations have fallen short. Now, inspired by the Apollo moon landings and armed with a powerful computer model, researchers at Brown University think they have an alternative answer for these swirly patterns. Over the past 100 million years, many small comets impacted the moon's pockmarked surface. Along with the icy nuclei that carved craters into the moon rock, the gaseous comet atmospheres — known as a comet's coma — would have also blasted into the moon's uppermost layer of regolith, possibly leaving the swirly imprint. "We think this makes a pretty strong case that the swirls represent remnants of cometary collisions," said planetary geoscientist Peter Schultz, at Brown University.
Space

Neil DeGrasse Tyson Urges America To Challenge China To a Space Race 275 275

An anonymous reader writes: According to a Tuesday story in the UK edition of the International Business Times, Neil deGrasse Tyson, the celebrity astrophysicist and media personality, advocates a space race between the United States and China. The idea is that such a race would spur innovation and cause industry to grow. The Apollo race to the moon caused a similar explosive period of scientific research and engineering development. You might prefer the Sydney Morning Herald piece on which the IB Times article is based.
Moon

India Ends Russian Space Partnership and Will Land On the Moon Alone 119 119

An anonymous reader writes: The Russian space program has experienced numerous accidents and delays recently, leading Indian officials to call into question its long term viability. Now India has decided to pull out of a partnership with Russia for a mission to the moon. According to the Examiner: "Previously, India was scheduled to launch a Russian lander on one of its rockets and send it to the lunar South Pole. Now, according to a story in Russia and India Report, India will go it alone, building its own lander to touch down on the lunar surface within the next few years.
NASA

NASA Announces the 3D Printed Habitat Challenge For Moon and Mars Bases 46 46

An anonymous reader writes: Space policy experts are still arguing where American astronauts should go once they venture into deep space. However, there is widespread agreement that once they get there they should be prepared to stay for longer than just a few hours or days, as was the case during the Apollo missions to the moon. Taking all the material to set up habitats, the astronauts' homes away from home, would tend to be expensive. Toward the end of lowering the cost of long duration space travel, NASA has announced the 3D Printed Habitat Challenge, in partnership with America Makes, as part of the ongoing Centennial Challenge program.
Space

Kepler Observes Neptune Dancing With Its Moons 19 19

New submitter Liquid Tip writes: NASA's K2 mission has the capability to stare continuously at a single field of stars for months at time. A new video shows K2 observations spanning 70 days from November, 2014 through January, 2015 reduced to a time-lapse of 34 seconds. During this time, we see some distant members of our Solar System passing through the K2 field-of-view. This includes some asteroids and the giant outer planet Neptune, which appears at day 15. A keen-eyed observer will also notice an object circling Neptune: its large moon, Triton, which orbits every 5.8 days. The fainter moon Nereid can be seen tracing Neptune's motion.
NASA

Apollo 15 Commander Talks About Developing and Driving Lunar Buggy 49 49

szczys writes: Greg Charvat recently sat in on an MIT course called "Engineering Apollo". For this set of sessions, David Scott recounted his experience as an astronaut. David was the commander of the Apollo 15 mission, flew several others, and took part in the development of much of the equipment used in the moon missions. The class is basically him hanging around with a bunch of engineers talking in a level of detail rarely heard. From the Hackaday article: "As if you had any doubts, but David confirms the lunar rover was really fun to drive. The vehicle had a wide wheel base, a low center of gravity, and each wheel had its own motor. But there was one occasion that caused a stir when the rover nearly slid down a mountain."
Earth

Subsurface Ocean Waves Can Be More Than 500 Meters High 61 61

An anonymous reader writes: New field studies out of MIT found that "internal waves" — massive waves below the surface of the ocean — can reach enormous sizes. The most powerful internal waves known to science are in the South China Sea, and they can be over 500 meters high. These waves mix disparate layers of ocean water, and contribute to evening temperatures between various bodies of water (abstract). The waves grow larger as they propagate, and carry on all year. These waves have enough mass to affect the earth-moon system: "To cut a long story short, it's not unreasonable to say internal waves play a role in the moon moving away or receding from the Earth. They are big enough that they affect large-scale celestial motions."
Communications

VA Tech Student Arrested For Posting Perceived Threat Via Yik Yak 254 254

ememisya writes: I wonder if I posted, "There will be another 12/7 tomorrow, just a warning." around December, would people associate it with Pearl Harbor and I would find myself arrested, or has enough time passed for people to not look at the numbers 12 and 7 and take a knee jerk reaction? A student was arrested for "Harassment by Computer" (a class 1 misdemeanor in the state of Virginia) due to his post on an "anonymous" website [Yik Yak]. Although the post in and of itself doesn't mean anything to most people in the nation, it managed to scare enough people locally for law enforcement agencies to issue a warrant for his arrest. "Moon, a 21-year-old senior majoring in business information technology, is being charged with Harassment by Computer, which is a class one misdemeanor. Tuesday night, April 28, a threat to the Virginia Tech community was posted on the anonymous social media app Yik Yak. Around 11:15 p.m., an unknown user posted 'Another 4.16 moment is going to happen tomorrow. Just a warning (sic).' The Virginia Tech Police Department released a crime alert statement Wednesday morning via email informing students that VTPD was conducting an investigation throughout the night in conjunction with the Blacksburg Police Department."
Earth

Pope Attacked By Climate Change Skeptics 703 703

HughPickens.com writes: The Telegraph reports that as the Vatican forges an alliance with the UN to tackle climate change, skeptics accuse Pope Francis of being deeply ill-informed about global warming. The Pope discussed climate change with Ban Ki-Moon, the UN Secretary-General, who then opened a one-day Vatican conference called "The Moral Dimensions of Climate Change and Sustainable Development". Organized by the Pontifical Academy of Sciences, the Pontifical Academy of Social Sciences, SDSN and Religions for Peace, the goal of the conference is to help strengthen the global consensus on the importance of climate change in the context of sustainable development.

But a group of British and American skeptics say the Pope is being fed "mistaken" advice from the UN and that he should stick to speaking out on matters of morality and theology rather than getting involved in the climate change debate. "The Pope has great moral authority but he's not an authority on climate science. He's a learned man but the IPCC has got it wrong," says Jim Lakely of the Heartland Institute, a conservative American pressure group partly funded by billionaire industrialists who question climate change. "The Pope would make a grave mistake if he put his moral authority behind scientists saying that climate change is a threat to the world. Many scientists have concluded that human activity is a minor player. The Earth has been warming since the end of the last Ice Age."

It was the first time the Heartland Institute, which is based in Chicago and has been described by the New York Times as "the primary American organization pushing climate change skepticism," has traveled to Rome to try to influence a pope. "The sideshow envisioned by these organizations will not detract from the deep concern that Pope Francis has for the truth and how it relates to the environment," says Dr. Bernard Brady, Professor and Chair of the Theology Department at the University of St. Thomas. "Pope Francis will probably follow his predecessor, Benedict XVI, recognizing the interrelatedness of climate change with other moral issues and calling for persons, organizations, communities, nations, and indeed the global community, to reconsider established patterns of behavior."
The Military

Scientists Locate Sunken, Radioactive Aircraft Carrier Off California Coast 193 193

HughPickens.com writes: Aaron Kinney reports in the San Jose Mercury News that scientists have captured the first clear images of the USS Independence, a radioactivity-polluted World War II aircraft carrier that rests on the ocean floor 30 miles off the coast of Half Moon Bay. The Independence saw combat at Wake Island and other decisive battles against Japan in 1944 and 1945 and was later blasted with radiation in two South Pacific nuclear tests. Assigned as a target vessel for the Operation Crossroads atomic bomb tests, she was placed within one-half-mile of ground zero and was engulfed in a fireball and heavily damaged during the 1946 nuclear weapons tests at Bikini Atoll. The veteran ship did not sink, however (though her funnels and island were crumpled by the blast), and after taking part in another explosion on 25 July, the highly radioactive hull was later taken to Pearl Harbor and San Francisco for further tests and was finally scuttled off the coast of San Francisco, California, on 29 January 1951. "This ship is an evocative artifact of the dawn of the atomic age, when we began to learn the nature of the genie we'd uncorked from the bottle," says James Delgado. "It speaks to the 'Greatest Generation' — people's fathers, grandfathers, uncles and brothers who served on these ships, who flew off those decks and what they did to turn the tide in the Pacific war."

Delgado says he doesn't know how many drums of radioactive material are buried within the ship — perhaps a few hundred. But he is doubtful that they pose any health or environmental risk. The barrels were filled with concrete and sealed in the ship's engine and boiler rooms, which were protected by thick walls of steel. The carrier itself was clearly "hot" when it went down and and it was packed full of fresh fission products and other radiological waste at the time it sank. The Independence was scuttled in what is now the Gulf of the Farallones sanctuary, a haven for wildlife, from white sharks to elephant seals and whales. Despite its history as a dumping ground Richard Charter says the radioactive waste is a relic of a dark age before the enviornmental movement took hold. "It's just one of those things that humans rather stupidly did in the past that we can't retroactively fix.""
Space

Enceladus Spreads Ghostly Ice Tendrils Around Saturn 33 33

astroengine writes A ghostly apparition has long been known to follow Saturn moon Enceladus in its orbit around the gas giant. But until now, scientists have had a hard time tracking its source. Using images from NASA's Cassini mission, the source of these tendrils have been tracked down and they originate from the icy moon's famous geysers. But even better than that, scientists have been able to track the tendril shapes down to the specific geysers that produce them. "We've been able to show that each unique tendril structure can be reproduced by particular sets of geysers on the moon's surface," said Colin Mitchell, a Cassini imaging team associate at the Space Science Institute in Boulder, Colo., and lead author of a paper published int he Astrophysical Journal. The study of these features are helping scientists understand how much ice is being transported into Saturn's E ring from Enceladus as well as helping us understand the evolution of the moon's sub-surface ocean.
Mars

Road To Mars: Solving the Isolation Problem 137 137

An anonymous reader writes: As space technology matures, new missions are being funded and humanity is setting its goals ever further. Space agencies are tackling some of the new problems that crop up when we try to go further away than Earth's moon. This New Yorker article takes a look at research into one of the biggest obstacles: extended isolation. Research consultant Jack Stuster once wrote, "Future space expeditions will resemble sea voyages much more than test flights, which have served as the models for all previous space missions." Long-duration experiments are underway to test the effects of isolation, but it's tough to study. You need many experiments to derive useful conclusions, but you can't just ship 100 groups of a half-dozen people off to remote areas of the globe and monitor all of them. It's also borderline unethical to expose the test subjects to the kind of stress and danger that would be present in a real Mars mission. The data collected so far has been (mostly) promising, but we have a long way to go. The technology and the missions themselves will probably come together long before we know how to deal with isolation. At some point, we'll just have to hope our best guess is good enough.
NASA

European Space Agency Invited To Contribute a Lander To NASA's Europa Clipper 33 33

MarkWhittington writes According to a story in Spaceflight Now, NASA has invited the European Space Agency to participate in its upcoming Europa Clipper project. Europa Clipper, pushed by Rep. John Culberson, the chair of the House Appropriations subcommittee that oversees NASA, recently received backing from the Obama administration. Europa Clipper would launch in the early 2020s and would be placed in an orbit around Jupiter that would cause it to fly by Europa, a moon of Jupiter, at least 45 times during its operational life.