Mostrando entradas con la etiqueta Astronautica. Mostrar todas las entradas
Mostrando entradas con la etiqueta Astronautica. Mostrar todas las entradas

jueves, mayo 16, 2013

Wheel fails on NASA’s Kepler probe, halting its search for alien planets

By Alan Boyle, Science Editor, NBC News
NASA's planet-hunting Kepler space telescope suffered a second failure in its reaction-wheel control system, forcing a suspension of its search for alien planets while the space agency determines whether the four-year mission is truly finished.
"It's certainly not good news," Charles Sobeck, deputy project manager for the $600 million mission at NASA's Ames Research Center, told reporters Wednesday.
But Sobeck and other mission managers emphasized that there was still a chance that the probe could be revived. "I wouldn't call Kepler down and out just yet," said John Grunsfeld, associate administrator for science at NASA Headquarters.
The problem has to do with the reaction wheels that are part of Kepler's fine-pointing system. The space telescope identifies worlds in far-off solar systems by watching for the telltale dips in starlight when the planet's disk passes over its parent sun. But in order to make those observations, Kepler has to hold itself in a precise position with the aid of four gyroscopic reaction wheels. One of the wheels failed last July, but Kepler could still do the job with the other three.
On Sunday, however, the spacecraft put itself into safe mode when it couldn't stay in its proper orbit around the sun, 40 million miles (64 million kilometers) from Earth. When the mission team did its regular check-up with Kepler on Tuesday, they found that a second reaction wheel wasn't working. In a mission update, NASA said the problem was probably caused by "a structural failure of the wheel bearing."
That forced an end to Kepler's planet quest. "We need three wheels in service to give us the pointing precision to make this work," the mission's principal investigator, William Borucki of NASA Ames, told NBC News.
Sobeck said the spacecraft itself could remain stable as long as it had fuel for its thrusters, but the thrusters aren't capable of providing the precise pointing that Borucki and his colleagues need. Over the next several months, members of the Kepler team will assess their technical options, and gauge what kind of science could be accomplished using those options, said Paul Hertz, astrophysics director at NASA Headquarters.
There's still a chance that the reaction-wheel system could be restored — for example, by trying to spin the wheel backward and forward, just as you might spin the wheels of a car that's stuck in a snowdrift. Sobeck said it might even be possible to revive the wheel that was shut down last July. "When we turn it on, it just might start spinning, we don't know," he said.
But mission managers also acknowledged that Kepler's planet-hunting days may be over. Hertz pointed out that the spacecraft outlasted its 3.5-year primary mission, and was currently into an extended mission costing $20 million a year.
Even if the spacecraft's control system can't be revived, it will still take another couple of years to analyze the trillions of bits of data already collected, Borucki said. The mission has already identified 132 confirmed planets and 2,740 additional candidates yet to be confirmed. Some of those worlds are thought to lie within the habitable zones of their planetary systems.
"The prime reason for the existence of this mission is to determine whether Earths are common or rare in our galaxy," Borucki said. So far, the evidence suggests that there are billions of Earth-size planets in the Milky Way. Scientists have not yet identified an Earth-size planet in an Earthlike orbit around a sunlike star, but Borucki voiced confidence that the crucial evidence was tucked away somewhere in the readings that have already been beamed down from Kepler.
"I am really delighted, frankly, with what we've accomplished," he said.

jueves, mayo 09, 2013

78,000 People Apply for One-Way Trip to Mars




www.dailymail.co.uk
An ambitious project to establish a human colony on Mars has attracted applications from tens of thousands of would-be astronauts, just two weeks after applications opened.
The mission, a private venture by the Dutch non-profit organization Mars One, aims to send a crew to the Red Planet in 2022 – and, due to the physiological change in the human body after a stay on Mars, there’d be no coming back. That hasn’t deterred people, though: so far, over 78,000 people have applied to become one of Mars’ first immigrants (the company is expecting 500,000 applicants by the time applications close on August 31). “This is turning out to be the most desired job in history,” says Bas Lansdorp, co-founder of Mars One.
Day-to-day life on Mars will be no picnic: The organization says that the daily routine on the planet would involve construction work on the colony (installing greenhouses, for example), maintenance of the settlement’s systems and research into Mars’ climate and geological history–all in an inhospitable environment with unbreathable air and an average temperature in the planet’s mid-latitudes of around -58 degrees Farenheit.
But Mars One says it is not looking for applicants with specific skills, such as a science degree, that might be useful during an interplanetary posting. Instead, they are looking for people who “have a deep sense of purpose, willingness to build and maintain healthy relationships, the capacity for self-reflection and ability to trust.” They also want volunteers who are “resilient, adaptable, curious, creative and resourceful.” Candidates will receive a minimum of eight years training before leaving Earth, the company says.
“Gone are the days when bravery and the number of hours flying a supersonic jet were the top criteria for selection. Now, we are more concerned with how well each astronaut works and lives with the others–and for a lifetime of challenges ahead,” said Norbert Kraft, a former Senior Research Associate at NASA and Chief Medical Director for Mars One in a statement published on Mars One’s website.
Candidates hailing from over 120 countries (although the vast majority are from the U.S.) uploaded a video to Mars One’s website explaining why they’re suitable for the mission. Kyle, a 21-year-old grocery store clerk from the U.S., says he wants to be “an explorer and pioneer at the forefront of history.” Steven, a 43-year-old American who works in electronics, has even higher hopes for the mission: “I would like to go to Mars… to discover new life,” he says.
In addition to people skills, successful applicants must be good fundraisers too: Mars One plans to raise much of the mission’s $6 billion estimated cost through a reality TV show following the applicants as they undergo preparations for the one-way trip to Mars. They’ve got a little way to go yet, though: as of April 29, the money raised through donations and merchandise stood at $84,121.

martes, abril 30, 2013

SpaceShipTwo estrena su motor y de paso rompe la barrera del sonido

La que aspira a ser la primer nave desarrollada con capital privado en llegar al espacio, el VSS Enterprise, llevó a cabo hoy su vuelo de prueba número 27, en el que se encendió su motor cohete por primera vez.
El encendido tuvo una duración programada de 16 segundos y sirvió para llevar la nave desde una altitud de 47.000 pies, a la que fue soltado por su avión nodriza, hasta los 55.000 pies, algo más de 18 kilómetros.
También hizo que alcanzara Mach 1,2.
Después de esto el VSS Enterprise, que en esta ocasión volaba con Mark Stucky como piloto y con Mike Alsbury como copiloto, volvió al espaciopuerto de Mojave, donde aterrizó sin ningún tipo de problema.
Este vuelo marca el inicio de la fase de vuelos de prueba supersónicos, la última antes de intentar un vuelo al espacio que, si todo va bien, podría tener lugar antes de finales de 2013.
La nota de prensa y las fotos están en Virgin Galactic breaks speed of sound in first rocket-powered flight of SpaceShipTwo, aunque la foto del día claramente es esta:
El motor encendido visto desde la cola
El motor encendido visto desde la cola del VSS Enterprise
Si tienes 200.000 dólares extra, a partir de 2014 o quizás de 2015 podrás hacer un vuelo en el VSS Enterprise o en uno de sus gemelos hasta más allá de la línea de Kármán y convertirte en un verdadero astronauta.

sábado, abril 06, 2013

Administration confirms NASA plan: Grab an asteroid, then focus on Mars

NASA's accelerated vision for exploration calls for moving a near-Earth asteroid even nearer to Earth, sending out astronauts to bring back samples within a decade, and then shifting the focus to Mars, a senior Obama administration official told NBC News on Saturday.
The official said the mission would "accomplish the president's challenge of sending humans to visit an asteroid by 2025 in a more cost-effective and potentially quicker time frame than under other scenarios." The official spoke on condition of anonymity because there was no authorization to discuss the plan publicly.
The source said more than $100 million would be sought for the mission and other asteroid-related activities in its budget request for the coming fiscal year, which is due to be sent to Congress on Wednesday. That confirms comments made on Friday by Sen. Bill Nelson, D-Fla., a one-time spaceflier who is now chairman of the Senate Commerce Subcommittee on Science and Space. It also confirms a report about the mission that appeared last month in Aviation Week.
The asteroid retrieval mission is based on a scenario set out last year by a study group at the Keck Institute for Space Studies. NASA's revised scenario would launch a robotic probe toward a 500-ton, 7- to 10-meter-wide (25- to 33-foot-wide) asteroid in 2017 or so. The probe would capture the space rock in a bag in 2019, and then pull it to a stable orbit in the vicinity of the moon, using a next-generation solar electric propulsion system. That would reduce the travel time for asteroid-bound astronauts from a matter of months to just a few days.
The Keck study estimated the total mission cost at $2.6 billion — but the administration official said the price tag could be reduced to $1 billion, or roughly $100 million a year, if the mission took advantage of an already-planned test flight for NASA's heavy-lift Space Launch System rocket and Orion crew exploration vehicle. That flight would send astronauts around the moon and back in 2021.
"This mission would combine the best of NASA's asteroid identification, technology development, and human exploration efforts to capture and redirect a small asteroid to just beyond the moon to set up a human mission using existing resources and equipment, including the heavy-lift rocket and deep-space capsule that have been under development for several years," the official said in an email.
The 2014 budget would set aside $78 million for planning the asteroid retrieval mission, plus $27 million to accelerate NASA's efforts to detect and characterize potentially hazardous asteroids. The federal government currently spends $20 million annually on asteroid detection.
Meteor sparked action
The official said the plan had been under discussion for months, but coalesced after February's meteor blast over Russia. The meteor's breakup injured more than 1,000 people and sparked a worldwide sensation. It also sparked a series of congressional hearings about threats from space, during which Republicans as well as Democrats hinted that they would support more funding to counter asteroid threats.
"This plan would help us prove we're smarter than the dinosaurs," said the official, referring to the asteroid that wiped out the dinosaurs and many other species 65 million years ago. An asteroid in the 7- to 10-meter range would be about half as wide as the one that broke up over Russia. That's far too small to pose any threat to Earth, even if the space rock was coming directly at our planet. But the captured asteroid could provide valuable insights for dealing with bigger ones in the future. 
Initial preparations for the mission won't have to wait for a deal to end budget sequestration, or approval of the budget for the 2014 fiscal year. NASA would begin immediately to identify the asteroid for retrieval, and take advantage of existing efforts funded by the agency's science, technology and human exploration directorates. The most expensive element of the plan, the multibillion-dollar Orion/SLS launch system, is already being funded under the terms of an agreement with Congress.
Discussions with NASA's international and commercial partners will continue in the months and years ahead, the official said. The retrieved asteroid could conceivably become a target for other scientific missions or asteroid-mining operations. In the process, governments might have to address issues surrounding the ownership and exploitation of space resources.
"We're trying to force the question," the official said. "We're trying to push the envelope on this new frontier."
Questions raised
Some observers have already raised questions about the plan, based on the advance reports. Scott Pace, the director of George Washington University's Space Policy Institute, told The Associated Press that it was a bad idea on scientific as well as diplomatic grounds. It would be better for the United States to join forces with other countries to conduct a comprehensive survey of all potentially dangerous asteroids, Pace said.
Rick Tumlinson, chairman of an asteroid-mining venture called Deep Space Industries, said he was concerned that NASA's asteroid mission might interfere with private-sector efforts — and he called on NASA to rely on private enterprise wherever possible. The administration official assured NBC News that cooperation with commercial ventures as well as other groups such as the B612 Foundation was part of the plan.
The official noted that the mission would provide a relatively low-cost route to satisfying President Barack Obama's goal of sending astronauts to a near-Earth asteroid by 2025. The lessons learned during the mission could be applied to future missions aimed at diverting other asteroids — perhaps to head off a potential threat, or conduct further scientific study, or exploit the potentially valuable resources that asteroids contain.
After the asteroid mission, NASA would turn its attention to a farther-out destination: Mars. The Obama administration has called for astronauts to travel to the Red Planet and its moons by the mid-2030s, and that would be the next major target for space exploration. The administration official told NBC News that other concepts, such as sending astronauts back to the moon or creating a deep-space platform beyond the far side of the moon, are not on the agenda for the foreseeable future.

viernes, abril 05, 2013

"From the AIRCAT Files" - Dr. Richard Haines Testimony

csetiweb
Dr. Haines has been a NASA research scientist since the mid 1960's. He has worked on the Gemini, Apollo and Skylab programs as well as several others. Over the past 30 years, Dr. Haines has compiled over 3,000 cases of unusual visual and radar sightings of unexplained aerial phenomena -- known as the AIRCAT files.

lunes, diciembre 24, 2012

Iran to unveil home-made satellite in Feb.: report

spacewar
by Staff Writers Tehran (XNA) Dec 24, 2012



In June, the defense minister said Iran's new space center, named Imam Khomeini Space Center, would be launched in the future and the Iranian scientists and experts from the Aerospace Industry Organization of the Defense Ministry would send into orbit new generation of the Islamic republic's satellites from the center.
Iran Space Agency (ISA) has announced that it will unveil a new home-made satellite in February, Tehran Times daily reported on Sunday.
Director of ISA, Hamid Fazeli, said Saturday that a new domestically-manufactured satellite, named the Nahid, will be unveiled on Feb. 2, 2013, which is Iran's National Space Technology Day, according to the report.
"The project to complete the satellite is going well, and we hope that the satellite will be unveiled on National Space Technology Day," Fazeli said, adding that it is more likely that Fajr (Dawn) and Sharifsat satellites will be sent into space by the end of the current Iranian calendar year, which ends on March 20.
The Iranian official did not elaborate on the technology and mission of the Iranian satellites.
According to the report, the Fajr is the first Iranian satellite that will be put into orbit. It is a reconnaissance satellite powered by solar energy.
On Wednesday, Iranian Defense Minister Brigadier General Ahmad Vahidi said that Iran was to unveil new space achievements soon.
Vahidi told reporters that the unveiling ceremony would take place on Feb. 2, Iran's National Space Technology Day.
In June, the defense minister said Iran's new space center, named Imam Khomeini Space Center, would be launched in the future and the Iranian scientists and experts from the Aerospace Industry Organization of the Defense Ministry would send into orbit new generation of the Islamic republic's satellites from the center.
As the first step, Vahidi said, the Dawn satellite would be launched into orbit from the Imam Khomeini Space Center.
Iran, a founding member of the United Nations Committee on the Peaceful Uses of Outer Space, launched its first domestically-made data-processing satellite, the Omid (Hope), into space in 2009.
Iran frequently says that it will push ahead with its space program in the coming years.

viernes, diciembre 21, 2012

Darwin in Space: How Multigenerational Missions Could Shape Human Evolution

“New environments inside this starship, for example, new radiation environments, whatever the gas composition is that people are breathing, whatever is the gravity field, those basic environmental conditions will reshape the human genome.”
That’s Cameron Smith. He’s an anthropologist at Portland State University who studies human evolution and prehistory. But he’s also very interested in the human future, including how space travel will impact the human race—both culturally and biologically. He wrote an article on the subject in the January issue of Scientific American, called “Starship Humanity.” He recently talked by phone with John Matson, host of our 60-Second Space podcast, about what might happen to a spacefaring humanity if we really were to take a star trek.
John Matson: This article that you’ve written for Scientific American, maybe you can just give us a brief overview of what the article is about.
Cameron Smith: You bet. So far the experience of humanity in space has been very limited. We have gone up for short periods of time, we’ve gone in very small numbers. But as space access becomes cheaper and more people start going up, eventually we’re going to have communities, we’re going to have populations of people up there. And then it shifts, our understanding of that is going to have to shift from purely biology to anthropology. These will be communities of people, and of course communities are cultural and they’re also biological. So anthropology marries culture and biology. And it will be used to help us plan out successful space colonization.
JM: Let’s say, just to set a scenario, a group of space travelers sets out on a multigenerational voyage to Alpha Centauri, where we now know that there is an exoplanet. What’s going to happen to these people on the way?
CS: Well, we can only predict that change will occur. We can make some predictions about some very few biological changes that might occur. But because mutation is random, and mutation is the origin of new characteristics in populations, because that is ultimately random, it’s not entirely possible to say precisely what will happen. What we can say, though, is that new environments—for example, new radiation environments, whatever the gas composition is that people are breathing, whatever is the gravity field inside this starship—those basic environmental conditions will reshape the human genome. Subtly, subtly, but they will reshape it.
We know that we have evolved under almost 15 pounds of pressure per square inch at sea level. And in the last few thousand years, though, some people have migrated to higher elevations, where they are under somewhat less pressure. Their biology has changed to account for that, or to make it possible to live there. They have different blood oxygen levels, they have deeper chests with greater what is called lung ventilation, greater capacity for breathing in and taking in oxygen. And even the biology of the developing infant is somewhat different. And I am certain that exactly the same sort of thing, on that same magnitude, will happen in off-Earth environments.
JM: What about weightlessness? Do we have any sense of what that would do to human physiology in terms of stature or size of human beings?
CS: Weightlessness is a big issue, and 30 years of almost continuous presence of humans in space—this is quite amazing—whether in Mir or the International Space Station or other stations, for 30 years somebody has been in Earth orbit almost continuously. What they have learned through that long period is that, yeah, weightlessness can have some pretty detrimental effects. Bone loss is one of them. Muscle is also reduced, but bone loss is a big one.
And so, I don’t think we’re going to try to do long-term space colonization in free-floating zero gravity. So we’ll go to places like Mars where there is one third, roughly, the gravity of Earth, and I think we’ll build these things that rotate and give us artificial—well, they give us gravity by rotating. You saw it in 2001: A Space Odyssey, the rotating space station. That works, and I think we’re going to be doing that for a much longer time than trying to actually live in zero or very small gravity.
But yes, it will have effects on the physiology as well. I was thinking of course in Mars, at one third, roughly, gravity, essentially in evolution, essentially if you can get away with something that costs less energy to do than your sibling, you have a selective advantage. And on Mars if you don’t require all of the muscle that a person does on Earth, where you have an extra two thirds gravity, then presumably you live in better health and have more offspring. So in the long term on Mars I think we will eventually see a lighter, lither build than on Earth.
JM: So the image of those spindly little green men is maybe not too far-fetched.
CS: Maybe so.
JM: Now, do we have a sense of how quickly these changes start to happen?
CS: The time scale for significant biological changes—yes, you can get them in a few centuries. You can start to see effects on the physiology in a number of centuries. This is the timescale that I’ve been working with. For example I’m in contact with a group in Germany called Icarus Interstellar. They’re devising propulsion systems to reach stars on the scale of several centuries. So I’ve been thinking about that scale as well—what kind of changes would we see in that kind of time frame? And some basic population genetics calculations that I’ve done, that concern what’s called time-to-fixation, and this is the spread of novel genes in a population.
And this suggests that yes, within a few centuries you could have changes on the order of different skin hues, or altered skin colors, different hair textures. But radical reshaping of the human body, for example. major stature differences or even new anatomical structures, those should take much, much longer. Those should take into the many thousands of years.
JM: There’s definitely a perception, especially in this country, in the U.S., that space exploration is on pause, that it’s ground to a halt. I happen to disagree with that, but it’s clear that no one is going to Alpha Centauri tomorrow. So why is it important to consider all these things now? Why is it important to think out all the implications of what space travel might mean?
CS: It’s absolutely important to start now because there’s so much to do. I mean, if we’re talking about long-term voyages, we’re talking about again, understanding things that we are just barely understanding today. For example, we have only in the last two decades got a high-resolution understanding of the human genome. And that helps us to understand human evolution, and evolution, it cannot be stopped. The only way to stop it is with extinction. And evolution of humanity is going to continue in space. And to prepare for it—again, you could do it without anthropology, but I don’t think it would survive. I don’t think it would work. So to do it with a good expectation of success, we need to think in long term. Well, what is the field that has given us a long-term understanding of humanity? That’s anthropology. Biology, relatively short-term, although it deals with evolution. But humanity, human evolution is somewhat different from most other evolution. And it's anthropology that has explored that. So, I think anthropology is going to be central to this.
JM: So as the physicists and engineers are working on propulsion systems and cosmic ray shielding, this is something that anthropologists should be working on in parallel, you believe?
CS: I believe absolutely we need to build an anthropology of space, an anthropology of space colonization. We know if we're going to spend generations in space that you have to prepare for the long term. Again, we think of it as people pop up there and they come back down. And the long-term view is, no, eventually, this will be migration. And this is part of the goal. Even just a few years ago NASA had a Vision Report that they released, which said that the essential mission of NASA was to better life here on Earth, to extend life there, that is, move some part of humanity to be able to live off of earth, and to find life beyond, that is exobiology. The interesting thing there is that in common in all three of those, what is common about those, it's not computers, it's not the technology, you need all of that, but what is common about those three statements is that it's about life. It's about living things. And living things change through time by evolution, and it's anthropology that has understood human evolution.
JM: You have a fairly recent book out about evolution.
CS: I have a book out now, a Popular Science book about human adaptation and space colonization, and in that my co-author and I are sketching out, it's an exploration, we're sketching out some of the kinds of ways that anthropology can assist us in making a success of space colonization. But right now I'm working on a technical book, it'll be a couple of years down the line, that again brings everything pertinent known from anthropology to the concept of space colonization, and hopefully that can be a foundation for a space anthropology.
JM: Now just to sort of wrap things up here, aside from the physics and the engineering of the actual spacecraft, what do you think will be the biggest challenge facing either the people who are putting together a crew for a long-duration spaceflight, or for the crew themselves?
CS: Well, one critique of this whole endeavor of space colonization and space activity by people in general is that, well, this isn’t going to fix humanity. We’re just going to transport our ancient problems off of the surface of the Earth. Well, I think so. Yeah, this isn’t meant to fix humanity. It is meant to give humanity an insurance policy. If the Earth is hit by a catastrophe, at least someone is left, if we are a several-planet species, for example.
The biggest challenge, I think they’ll be both biological and cultural. We don’t know how reproduction works in space. We also have to be very careful—we can’t just be ready to go and colonize space once we understand human biology in space and human evolution. We have thousands of plant and animal domesticates that are going to have to go with us. We can’t be eating canned food for generations. We have to ensure the health of those populations as well. That is why, you asked before, why start now? Well, there is a tremendous amount to do to think about all this.
So what will be the challenges? They will be both biological and cultural. We will have biological evolution happening—some of it will be painful. Much of that evolution will play out on those early stages of development. And there will be an increase, let’s say, in infant mortality. We’ll also have our same cultural baggage. We have ethnic rivalries, we have political differences, we have religious issues. I don’t think that’s going to go away. We should certainly take our best nature with us, but those things are rather ancient, and I think those will be as big a challenge as the biology.
Cameron Smith’s book, co-authored with Evan Davies is titled Emigrating Beyond Earth: Human Adaptation and Space Colonization. And Smith’s article "Starship Humanity" is in the January issue of Scientific American. A short preview is available free on the Web site, titled "How Humans Will Evolve on Multigenerational Space-Exploration Missions."
That’s it for this episode. Get your science news at our Web site, www.scientificamerican.com, where you can check out the In-Depth Report about Humanity’s Enduring Fascination with the Apocalypse. The so-called Mayan apocalypse is just the latest in a long line of doomsday predictions. And, ironically, it will not be the last. And follow us on Twitter, where you’ll get a tweet whenever a new article hits the Web site. Our Twitter name is @sciam. For Scientific American’s Science Talk, I’m Steve Mirsky, thanks for clicking on us.

jueves, diciembre 13, 2012

CORONA: The World's First Reconnaissance Satellite

ciagovThis video was made by the National Reconnaissance Office for the declassification ceremony for CORONA, held on May 25, 1995. Video from the booklet "CIA Analysis of the Warsaw Pact Forces: The Importance of Clandestine Reporting."

viernes, diciembre 07, 2012

Golden Spike space-tourism company: ‘To the moon!’

WP/

dvice.com
It had to happen: A start-up company is offering rides to the moon. Book your seat now — though it’s going to set you back $750 million (it’s unclear if that includes baggage fees).
Led by heavy-hitter former NASA executives, the Golden Spike Co. would boldly go where humankind went 40 years ago, this time commercially, hawking tickets to foreign governments or space tourists.
“Two seats, 750 each,” former NASA associate administrator Alan Stern said on Thursday, shortly before he appeared at the National Press Club in Washington to announce the formation of the company. “The trick is 40 years old. We know how to do this.”
You won’t have to joystick the lunar lander yourself, so don’t worry about dodging killer craters and boulders on the way down. Everything will be automated and controlled from Earth. It’ll be like taking a train, the company said.
“We realize this is the stuff of science fiction. We intend to make it science fact,” Stern said at the news conference. He added: “We believe in the price points that we’re talking about.”
The company has assembled some credible advisers, with a board chaired by former NASA Johnson Space Center director Gerry Griffin. The business model requires economies of scale — lots of customers and lots of missions to the moon to offset the very high start-up cost. The company sees 2020 as a plausible date for that initial trip.
Golden Spike would need to commission a lunar lander and moonwalking suits, but most of its mission architecture would rely on commercial rockets and capsules already flying or under development. For example, the company could use a rocket and capsule developed by Elon Musk’s commercial start-up SpaceX, which has successfully flown cargo to the international space station under a NASA contract.
The primary targets for Golden Spike are foreign countries that want to do lunar science or attain the prestige of putting their own astronauts on the moon. Because of political sensitivities, the company would not sell a moon trip to China, which has been expanding its space program, Stern said. Nor would the company sell rides to any country restricted by law from access to U.S. technology that could be used for military purposes. Keep reading >>

martes, diciembre 04, 2012

Curiosity rover finds organic compounds, but are they from Mars?

NASA / JPL-Caltech / MSSS

Although NASA's Curiosity rover hasn't yet confirmed the detection of organic compounds on Mars, it's already seeing that the Red Planet's soil contains water and more complex chemicals — including signs of an intriguing compound called perchlorate.

The first soil sample analysis from Curiosity's Sample Analysis at Mars lab, or SAM, was the leadoff topic today at the American Geophysical Union's fall meeting in San Francisco. The findings were eagerly awaited because of rumors that the Curiosity team was on the verge of announcing major findings — and although NASA tamped down expectations, the scientists said they were overjoyed with the first round of analysis.

"We really consider this a terrific milestone," Paul Mahaffy, a NASA researcher who is SAM's lead scientist, said at the AGU briefing.

Mahaffy said in a statement issued by NASA's Jet Propulsion Laboratory that "we have no definitive detection of Martian organics at this point, but we will keep looking in the diverse environments of Gale Crater."

Curiosity landed in Gale Crater on Aug. 5, and since then it's been studying Martian rocks, soil and atmosphere with a suite of 10 scientific instruments. Its two-year, $2.5 billion primary mission is aimed at determining whether conditions in the crater were ever conducive for microbial life.

SAM is a key tool for that mission, because it can cook Martian samples in a mini-oven and then analyze the gases that are given off to identify the compounds contained in the sample. Other instruments — including the Chemistry and Mineralogy instrument, or CheMin — were used as well to study the initial soil samples, collected over the past several weeks from a drift of windblown sand and dust called Rocknest.

This Oct. 31 view from Curiosity's Mars Hand Lens Imager, or MAHLI, shows two of the trenches made by the rover's 1.6-inch-wide (4-centimeter-wide) sampling scoop. The dust and sand from a dune known as Rocknest were fed into Curiosity's onboard labs for analysis.

NASA said CheMin found that the composition of the Rocknest samples was similar to that of soil analyzed by other Mars rovers such as Pathfinder, Spirit and Opportunity — about half common volcanic minerals, and half non-crystalline minerals such as glass. SAM identified other ingredients in much lower concentrations, including water molecules that were apparently bound to the grains of sand and dust. Although the water wouldn't be enough to support any sort of life, the concentration was higher than expected.

SAM also identified a type of perchlorate, a compound that includes oxygen and chlorine. Perchlorate, which was also found by NASA's Phoenix Mars Lander in 2008, is considered a toxic substance and used as an ingredient in rocket fuel on Earth. But scientists say the compound could conceivably serve as an energy source for hardy microbes on Mars. Mahaffy said the particular type of compound detected by Curiosity appeared to be calcium perchlorate, but "we have to study that further."

Reactions with other chemicals in SAM's oven formed chlorinated methane compounds, which geologists consider organic chemicals because they contain carbon and hydrogen. Mahaffy said it was most likely that the chlorine came from a perchlorate-like compound in the soil. However, he said it wasn't yet clear whether the tiny amount of carbon in the compounds came from the Martian soil or was actually brought to Mars from Earth by Curiosity itself.

"We have to be very careful to make sure both the carbon and the chlorine are coming from Mars," he told reporters. More >>

lunes, noviembre 26, 2012

2023: Pioneer wants 80,000 of us to colonize Mars

By
Elon Musk, the billionaire founder and CEO of the private spaceflight company SpaceX, wants to help establish a Mars colony of up to 80,000 people by ferrying explorers to the Red Planet for perhaps $500,000 a trip.
In Musk's vision, the ambitious Mars settlement program would start with a pioneering group of fewer than 10 people, who would journey to the Red Planet aboard a huge reusable rocket powered by liquid oxygen and methane.
"At Mars, you can start a self-sustaining civilization and grow it into something really big," Musk told an audience at the Royal Aeronautical Society in London on Nov. 16. Musk was there to talk about his business plans, and to receive the society’s gold medal for his contribution to the commercialization of space.
Mars pioneers Accompanying the founders of the new Mars colony would be large amounts of equipment, including machines to produce fertilizer, methane and oxygen from Mars’ atmospheric nitrogen and carbon dioxide and the planet's subsurface water ice.
The Red Planet pioneers would also take construction materials to build transparent domes, which when pressurized with Mars’ atmospheric CO2 could grow Earth crops in Martian soil. As the Mars colony became more self sufficient, the big rocket would start to transport more people and fewer supplies and equipment. [Future Visions of Human Spaceflight]
Musk’s architecture for this human Mars exploration effort does not employ cyclers, reusable spacecraft that would travel back and forth constantly between the Red Planet and Earth — at least not at first
"Probably not a Mars cycler; the thing with the cyclers is, you need a lot of them," Musk told Space.com. "You have to have propellant to keep things aligned as (Mars and Earth’s) orbits aren’t (always) in the same plane. In the beginning you won’t have cyclers."
Musk also ruled out SpaceX's Dragon capsule, which the company is developing to ferry astronauts to and from low-Earth orbit, as the spacecraft that would land colonists on the Red Planet. When asked by Space.com what vehicle would be used, he said, "I think you just land the entire thing."
Asked if the "entire thing" is the huge new reusable rocket — which is rumored to bear the acronymic name MCT, short for Mass Cargo Transport or Mars Colony Transport — Musk said, "Maybe."
Musk has been thinking about what his colonist-carrying spacecraft would need, whatever it ends up being. He reckons the oxygen concentration inside should be 30 to 40 percent, and he envisions using the spacecraft’s liquid water store as a barrier between the Mars pioneers and the sun. More >>

viernes, octubre 05, 2012

Skydiver ready to jump from 23 miles above Earth's surfaces

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Austrian daredevil Felix Baumgartner will attempt to break the world record for highest-ever skydive, leaping from a balloon nearly 23 miles above Earth’s surface.
If all goes according to plan, Baumgartner will step into the void 120,000 feet (36,576 meters) above southeastern New Mexico early Monday, then plummet to Earth in a harrowing freefall that will see him become the first skydiver to break the sound barrier.
After Baumgartner deploys his parachute and floats safely to the desert floor, he and the other architects of his mission — which is known as Red Bull Stratos — can celebrate breaking a skydiving record that has stood for more than 50 years.
One of those congratulating Baumgartner will likely be Joe Kittinger, who set the current record of 102,800 feet (31,333 m) in 1960 while a captain in the U.S. Air Force. Kittinger serves as a Red Bull Stratos adviser. [Extreme Skydive From 120,000 Feet (Video)]
If everything works out on Monday, Baumgartner will also shatter the marks for fastest freefall, longest-duration freefall and highest manned balloon flight. But the daredevil says his leap is about more than just etching his name in the record books.
"Red Bull Stratos is an opportunity to gather information that could contribute to the development of life-saving measures for astronauts and pilots — and maybe for the space tourists of tomorrow," Baumgartner said in a statement. "Proving that a human can break the speed of sound in the stratosphere and return to Earth would be a step toward creating near-space bailout procedures that currently don’t exist."
Baumgartner's 55-story-high balloon is slated to launch from Roswell, N.M., at dawn Monday, weather permitting. Winds must not exceed 2 mph (3.2 kph) at liftoff to ensure that the balloon — whose material is 10 times thinner than a plastic sandwich bag — isn't damaged, Red Bull Stratos officials said.  More >>
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Retratos de fusilados por el Castrismo - Juan Abreu

"Hablame"

"EN TIEMPOS DIFÍCILES" - Heberto Padilla

A aquel hombre le pidieron su tiempo

para que lo juntara al tiempo de la Historia.

Le pidieron las manos,

porque para una época difícil

nada hay mejor que un par de buenas manos.

Le pidieron los ojos

que alguna vez tuvieron lágrimas

para que contemplara el lado claro

(especialmente el lado claro de la vida)

porque para el horror basta un ojo de asombro.

Le pidieron sus labios

resecos y cuarteados para afirmar,

para erigir, con cada afirmación, un sueño

(el-alto-sueño);

le pidieron las piernas

duras y nudosas

(sus viejas piernas andariegas),

porque en tiempos difíciles

¿algo hay mejor que un par de piernas

para la construcción o la trinchera?

Le pidieron el bosque que lo nutrió de niño,

con su árbol obediente.

Le pidieron el pecho, el corazón, los hombros.

Le dijeron

que eso era estrictamente necesario.

Le explicaron después

que toda esta donación resultaria inútil.

sin entregar la lengua,

porque en tiempos difíciles

nada es tan útil para atajar el odio o la mentira.

Y finalmente le rogaron

que, por favor, echase a andar,

porque en tiempos difíciles

esta es, sin duda, la prueba decisiva.

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La columna de Cubanalisis

NEOCASTRISMO [Hacer click en la imagen]

NEOCASTRISMO [Hacer click en la imagen]
¨Saturno jugando con sus hijos¨/ Pedro Pablo Oliva

Seguidores

Carta desde la carcel de Fidel Castro Ruz

“…después de todo, para mí la cárcel es un buen descanso, que sólo tiene de malo el que es obligatorio. Leo mucho y estudio mucho. Parece increíble, las horas pasan como si fuesen minutos y yo, que soy de temperamento intranquilo, me paso el día leyendo, apenas sin moverme para nada. La correspondencia llega normalmente…”

“…Como soy cocinero, de vez en cuando me entretengo preparando algún pisto. Hace poco me mandó mi hermana desde Oriente un pequeño jamón y preparé un bisté con jalea de guayaba. También preparo spaghettis de vez en cuando, de distintas formas, inventadas todas por mí; o bien tortilla de queso. ¡Ah! ¡Qué bien me quedan! por supuesto, que el repertorio no se queda ahí. Cuelo también café que me queda muy sabroso”.
“…En cuanto a fumar, en estos días pasados he estado rico: una caja de tabacos H. Upman del doctor Miró Cardona, dos cajas muy buenas de mi hermano Ramón….”.
“Me voy a cenar: spaghettis con calamares, bombones italianos de postre, café acabadito de colar y después un H. Upman #4. ¿No me envidias?”.
“…Me cuidan, me cuidan un poquito entre todos. No le hacen caso a uno, siempre estoy peleando para que no me manden nada. Cuando cojo el sol por la mañana en shorts y siento el aire de mar, me parece que estoy en una playa… ¡Me van a hacer creer que estoy de vacaciones! ¿Qué diría Carlos Marx de semejantes revolucionarios?”.

Quotes

¨La patria es dicha de todos, y dolor de todos, y cielo para todos, y no feudo ni capellaní­a de nadie¨ - Marti

"No temas ni a la prision, ni a la pobreza, ni a la muerte. Teme al miedo"
-
Giacomo Leopardi

¨Por eso es muy importante, Vicky, hijo mío, que recuerdes siempre para qué sirve la cabeza: para atravesar paredes¨Halvar de Flake [El vikingo]

"Como no me he preocupado de nacer, no me preocupo de morir" - Lorca

"Al final, no os preguntarán qué habéis sabido, sino qué habéis hecho" - Jean de Gerson

"Si queremos que todo siga como está, es necesario que todo cambie" - Giuseppe Tomasi di Lampedusa

"Todo hombre paga su grandeza con muchas pequeñeces, su victoria con muchas derrotas, su riqueza con múltiples quiebras" - Giovanni Papini


"Life is what happens while you are busy making other plans" - John Lennon

"Habla bajo, lleva siempre un gran palo y llegarás lejos" - Proverbio Africano

"No hay medicina para el miedo" - Proverbio escoces

"El supremo arte de la guerra es doblegar al enemigo sin luchar"
- Sun Tzu

"You do not really understand something unless you can explain it to your grandmother" - Albert Einstein

"It is inaccurate to say I hate everything. I am strongly in favor of common sense, common honesty, and common decency. This makes me forever ineligible for public office" - H. L. Menken

"I swore never to be silent whenever and wherever human beings endure suffering and humiliation. We must always take sides. Neutrality helps the oppressor, never the victim. Silence encourages the tormentor, never the tormented" - Elie Wiesel

"Stay hungry, stay foolish" -
Steve Jobs

"If you put the federal government in charge of the Sahara Desert , in five years ther'ed be a shortage of sand" - Milton Friedman

"The tragedy of modern man is not that he knows less and less about the meaning of his own life, but that it bothers him less and less" - Vaclav Havel

"No se puede controlar el resultado, pero si lo que uno haga para alcanzarlo" -
Vitor Belfort [MMA Fighter]

Liborio

Liborio
A la puerta de la gloria está San Pedro sentado y ve llegar a su lado a un hombre de cierta historia. No consigue hacer memoria y le pregunta con celo: ¿Quién eras allá en el suelo? Era Liborio mi nombre. Has sufrido mucho, hombre, entra, te has ganado el cielo.

Para Raul Castro

Cuba ocupa el penultimo lugar en el mundo en libertad economica solo superada por Corea del Norte.

Cuba ocupa el lugar 147 entre 153 paises evaluados en "Democracia, Mercado y Transparencia 2007"

Cuando vinieron

Cuando vinieron a buscar a los comunistas, Callé: yo no soy comunista.
Cuando vinieron a buscar a los sindicalistas, Callé: yo no soy sindicalista.
Cuando vinieron a buscar a los judíos, Callé: yo no soy judío. Cuando vinieron a buscar a los católicos, Callé: yo no soy “tan católico”.
Cuando vinieron a buscarme a mí, Callé: no había quien me escuchara.

Reverendo Martin Niemöller

Martha Colmenares

Martha Colmenares
Un sitio donde los hechos y sus huellas nos conmueven o cautivan
Bloggers Unite

CUBA LLORA Y EL MUNDO Y NOSOTROS NO ESCUCHAMOS

Donde esta el Mundo, donde los Democratas, donde los Liberales? El pueblo de Cuba llora y nadie escucha.
Donde estan los Green, los Socialdemocratas, los Ricos y los Pobres, los Con Voz y Sin Voz? Cuba llora y nadie escucha.
Donde estan el Jet Set, los Reyes y Principes, Patricios y Plebeyos? Cuba desesperada clama por solidaridad.
Donde Bob Dylan, donde Martin Luther King, donde Hollywood y sus estrellas? Donde la Middle Class democrata y conservadora, o acaso tambien liberal a ratos? Y Gandhi? Y el Dios de Todos?
Donde los Santos y Virgenes; los Dioses de Cristianos, Protestantes, Musulmanes, Budistas, Testigos de Jehova y Adventistas del Septimo Dia. Donde estan Ochun y todas las deidades del Panteon Yoruba que no acuden a nuestro llanto? Donde Juan Pablo II que no exige mas que Cuba se abra al Mundo y que el Mundo se abra a Cuba?
Que hacen ahora mismo Alberto de Monaco y el Principe Felipe que no los escuchamos? Donde Madonna, donde Angelina Jolie y sus adoptados around de world; o nos hara falta un Brando erguido en un Oscar por Cuba? Donde Sean Penn?
Donde esta la Aristocracia Obrera y los Obreros menos Aristocraticos, donde los Working Class que no estan junto a un pueblo que lanquidece, sufre y llora por la ignominia?
Que hacen ahora mismo Zapatero y Rajoy que no los escuchamos, y Harper y Dion, e Hillary y Obama; donde McCain que no los escuchamos? Y los muertos? Y los que estan muriendo? Y los que van a morir? Y los que se lanzan desesperados al mar?
Donde estan el minero cantabrico o el pescador de percebes gijonese? Los Canarios donde estan? A los africanos no los oimos, y a los australianos con su acento de hombres duros tampoco. Y aquellos chinos milenarios de Canton que fundaron raices eternas en la Isla? Y que de la Queen Elizabeth y los Lords y Gentlemen? Que hace ahora mismo el combativo Principe Harry que no lo escuchamos?
Donde los Rockefellers? Donde los Duponts? Donde Kate Moss? Donde el Presidente de la ONU? Y Solana donde esta? Y los Generales y Doctores? Y los Lam y los Fabelo, y los Sivio y los Fito Paez?
Y que de Canseco y Miñoso? Y de los veteranos de Bahia de Cochinos y de los balseros y de los recien llegados? Y Carlos Otero y Susana Perez? Y el Bola, y Pancho Cespedes? Y YO y TU?
Y todos nosotros que estamos aqui y alla rumiando frustaciones y resquemores, envidias y sinsabores; autoelogios y nostalgias, en tanto Louis Michel comulga con Perez Roque mientras Biscet y una NACION lanquidecen?
Donde Maceo, donde Marti; donde aquel Villena con su carga para matar bribones?
Cuba llora y clama y el Mundo NO ESCUCHA!!!

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