Category: Space Exploration

Entrepreneurs Anousheh Ansari and Amir Ansari, today announced a multimillion dollar contribution to the X PRIZE Foundation which runs an international competition among private spaceships designed to fly the general public into space. On this day, the 43rd anniversary of astronaut Alan Shepard’s suborbital flight into space, the X PRIZE competition is being renamed the ANSARI X PRIZE Competition to reflect the newly-established title sponsorship. The ANSARI X PRIZE is modeled after the $25,000 Orteig Prize won by Charles Lindbergh in 1927 for his historic flight from New York to Paris.

The ANSARI X PRIZE will award $10 million to the first private organization to build and fly a ship that can carry three passengers 100 km (62 miles) into space, return safely to Earth and repeat the launch with the same ship within two weeks. Both flights must be completed by January 1st, 2005. The competition has been endorsed by leading space and aviation organizations around the world and includes the vision to jump-start the commercialization of space travel and industry the same way that Orteig Prize opened today’s commercial airways.

Space exploration has always been a childhood dream for both Anousheh and brother-in-law Amir, who were born in Iran. “As a child I looked at the stars and dreamed of being able to travel into space,” said Anousheh, an avid space enthusiast. “As an adult, I understand that the only way this dream will become a reality is with the participation of private industry and the creative passion of smart entrepreneurs. The ANSARI X PRIZE provides the perfect vehicle to ignite the imagination and passion of fellow entrepreneurs, giving them and their courageous pilots a platform for success.”

Currently, 26 teams from seven nations around the world have registered to compete. Several teams have already conducted successful test launches and plan to announce their competition launches within the next few months.

“The vision for the X PRIZE Foundation and the ANSARI X PRIZE competition began in May 1996 with the support of the business leaders from the St. Louis Community,” said Dr. Peter H. Diamandis, X PRIZE Foundation Chairman and Founder. “My dream, along with Anousheh and Amir, has been to open space travel to the public. With profound thanks to the Ansari family, we have created a self-fulfilling prophecy. The ANSARI X PRIZE Teams are creating a multitude of different designs specifically for public access. One of these unique designs will win in the months ahead and many others will go on to offer commercial services.”

In March 2004 the X PRIZE Foundation also announced a Presenting Sponsorship from Champ Car World Series, the leading open-wheel race car series. The competition has room for two remaining major sponsorships which will provide a company with its logo on all the competing spaceships, hospitality and a variety of other benefits.

About Anousheh Ansari
Anousheh Ansari is a co-founder of venture capital firm Prodea, Inc. Mrs. Ansari co-founded telecom technologies, inc. (tti), a supplier of softswitch-based solutions for network and service providers in 1993, which was acquired by Sonus Networks in 2000. She was listed in the Fortune magazine’s “40 Under 40” in 2001, recognized by Working Woman magazine as the winner of the 2000 National Entrepreneurial Excellence award and was chosen as the winner of the 1999 Ernst and Young Entrepreneur of the Year, Southwest Region, for the Technology and Communications category.

About Amir Ansari
Amir Ansari is a co-founder of venture capital firm, Prodea, Inc. Mr. Ansari co-founded telecom technologies, inc. and served as the CTO for the company prior to its acquisition by Sonus Networks. He has filed several patents in the area of Voice over IP and is currently sitting on the Board of Directors of several technology companies.

About the X PRIZE Foundation
The X PRIZE Foundation is a not-for-profit educational organization with headquarters in St. Louis, Missouri. Supported by private donations and the St. Louis community, the Foundation’s mission is to create educational programming for students and space enthusiasts as well as provide incentives in the private sector to make space travel frequent and affordable for the general public. Several additional sponsorships for the ANSARI X PRIZE competition remain available to corporations or individuals who wish to support the X PRIZE Foundation and associate themselves with space, speed and high technology.

Original Source: X PRIZE News Release

Image credit: SpaceDev
SpaceDev (OTCBB: SPDV) announced that it has been awarded a five-year $43 million cost-plus-fixed fee indefinite delivery/indefinite quantity contract by the Missile Defense Agency (MDA) to conduct a micro satellite distributed sensing experiment, an option for a laser communications experiment, and other micro satellite studies and experiments as required in support of the Advanced System Deputate. The first of four phases is expected to be completed this year and will result in detailed mission and microsat designs. The milestone-based, multiyear, multiphase contract has an effective start date of March 1, 2004.

?This contract is our largest award to-date, and the successful completion of each contract phase would result in significantly accelerated growth in sales and revenues for us over the next few years,? said SpaceDev founding chairman and chief executive, Jim Benson. ?This award is the result of working collaboratively with the MDA team for two years, and our successful and revolutionary Internet-based CHIPSat microsatellite launched in January 2003.

SpaceDev?s new high precision microsats for MDA will build on and improve proprietary SpaceDev-developed CHIPSat technology, such as SpaceDev?s high performance, Miniature Flight Computer?, SpaceDev?s general purpose Micro Space Vehicle Operating System?, SpaceDev?s Internet-based Mission Control and Operations Software? that permits SpaceDev satellites to be controlled from anywhere in the world from a laptop computer. For the new low earth orbit MDA satellites, SpaceDev will increase pointing and tracking precision, increase the processing power of its flight computer to achieve more difficult real-time problem solving on-orbit, add autonomous satellite commissioning, and will introduce other innovative techniques and technologies.

?The SpaceDev engineering team continues its transformational thinking by developing and delivering fast turnaround, high performance, responsive space systems at affordable prices,? said Benson. ?With CHIPSat, our hybrid-based Streaker? small launch vehicle under development for the Air Force, and our hybrid rocket motors for safe government and private sector human space flight, we feel that SpaceDev is in a position to achieve more firsts in space technology and operations. We believe that SpaceDev is becoming a global leader for responsive and innovative small satellites and hybrid rocket propulsion systems.?

Original Source: Spacedev News Release

Image credit: ESA
Will swarms of co-operating robots one day be exploring some of the most intriguing worlds in the solar system? James Law, an engineer who is a doctoral student at the Open University, supports the idea that using whole teams of robotic explorers working together offers distinct advantages, especially when it comes to tackling the challenges presented by remote bodies such as Europa and Titan. In a presentation on Wednesday 31 March at the Royal Astronomical Society’s National Astronomy Meeting at the Open University, he will be reviewing some current ideas on co-operative robot technology and suggesting how it might be applied to a Titan mission with a concept for a ‘Master’ robot controlling a bevy of ‘Slaves’.

Of the 17 landers sent to investigate Mars, only 5 have survived to perform their missions. In spite of this, scientists are already looking for their next planetary targets, with Saturn’s moon Titan and Jupiter’s moon Europa being distinct possibilities. Given both the greater distances involved, and extreme climatic conditions, how can the likelihood of a successful robotic surface mission be increased? Although robotic rovers have become the preferred choice over static landers, due to their greater versatility, the addition of motion systems increases their weight and reduces the reliability of these already complex mechanisms.

Advantages of teamwork
One alternative, proposed in 1989 by Rodney Brooks of the Massachusetts Institute of Technology, is finally coming to fruition – the idea of replacing solitary rovers with swarms of cooperative robots. With scientific equipment evenly distributed between them, each rover can be made smaller, lighter, and less complex. These robots can then work together or independently, in order to complete the mission objectives.

This approach has several distinct advantages. Launch costs could be reduced and soft landings achieved by delivering lighter payloads. Robustness is improved, since a critical failure on any rover is isolated from the rest. Although losing a rover may restrict the capabilities of the swarm, it is not likely to result in termination of the mission. Indeed, in many cases the affected rover will still be able to play a useful, though limited role.

Robotic swarms permit a variety of new missions, such as simultaneous measurements over wide areas, useful in climate monitoring and seismic sounding, or multiple experiments performed concurrently by different robots. Rovers can also work together to access areas of greater scientific interest, for example cliff faces. James Law cites David Barnes of the University of Wales at Aberystwyth, who is developing a swarm of aerobots – flying robots which could be used for terrain mapping or deploying smaller micro rovers. Another benefit of using small cooperative rovers is that additional robots can be launched and integrated into the swarm to extend a mission, enabling new experiments, or replacement of lost and damaged rovers.

Robots for Titan
In his talk, James Law will present his own vision for a mission to Titan. Though we have to wait for the Huygens probe, due to land on Titan early next year, to discover the true nature of Titan’s surface, it is likely to be mixed. “In this situation, a Master-Slave robot configuration with a variety of transport modes could be favourable,” he suggests. “A ‘Master’ lander supplying power and communications provides an outpost for a number of small ‘Slave’ rovers and balloons. The lander would be equipped with a range of scientific packages, which it could distribute amongst its slave robots depending on the environment around the landing site. These subordinate robots are then able to act either cooperatively – for example, to dig and image a trench in order to investigate its geological layers – or on their own, analysing or collecting samples and returning them to the lander for more in-depth analysis. The rovers would return to the lander to recharge their batteries and change their scientific payloads. Robots capable of operating in a liquid environment could be dispersed on any Titan sea to measure wave motion, perhaps by balloon, then be sacrificed, by ‘drowning’, to measure conditions below the surface.”

Exploring Europa
Among schemes proposed by others that James Law will review is one for the exploration of Europa, devised by Jeff Johnson of the Open University and Rodney Buckland of the University of Kent. It involves Self Organising IMAging Robots, or soimars, small cube-shaped robots each carrying a single-pixel imaging device (such as a photodiode) and weighing as little as 10 grams. Each one is able to communicate with its neighbours and is capable of moving in water, using small propulsion screws. A swarm of these tiny robots could be deployed into a sub surface ocean on Europa to image the environment.

A transport craft containing communications and power facilities would land on Europa’s ice crust and release an ice-penetrating device containing the soimars. This device would bore through the ice and release the soimars into the ocean. The soimars then self-organise into a stack, aligning their imaging devices. By cooperatively swimming, the stack scans an area under the ice. If a single imaging device fails, the faulty soimar is simply released and the swarm reorganises to form an error free array. This also enables more soimars, perhaps from subsequent landers, to join the swarm and improve the image resolution. In this configuration, the soimars are physically attached to one another. An alternative use would be to equip them with touch sensors and have them swim as a dispersed cloud along the ocean floor, mapping its elevation. A simulation has been developed at the Open University to demonstrate the self-organising behaviour of the swarm.

A mechanical workforce for Mars
The Jet Propulsion Laboratory (JPL) has research underway on cooperative robot teams, including robotic work crews for carrying large items, robotic excavation teams, and robots that can rappel one another down steep cliff faces. An objective of this work at JPL is to deploy a robotic workforce on Mars to construct mining and refining facilities, which will provide fuel for future human missions. With proposals to land men on Mars, and eventually more distant locations, these robotic work crews will be indispensable in both investigating the destinations, and creating outposts to support our arrival.

Original Source: RAS News Release

Image credit: NASA
Sludge. That’s what most people think of when they envision the gray, powdery soil ? called regolith ? covering the airless surface of the Moon. Not Dr. Mike Duke. He sees gold.

Gold in the form of rocket propellant, power, and even breathable air ? all things that will be as valuable as gold to the first Moon-dwellers.

“As a young man, I wanted to go to the Moon,” says 68-year-old Duke, who was one of the first geologists to study samples from Moon rocks collected during the Apollo missions in the 1970s. I may be too old to make the trip when Americans return to the Moon, but the research I am leading will help the first lunar settlers take what’s there and make something practical.”

Duke is an expert in what space explorers call “in-situ resource utilization” or ISRU ? living off the land of an alien world. In 2003, he was named director of the Center for Commercial Applications of Combustion in Space Centers at the Colorado School of Mines in Golden ? one of NASA’s 15 Research Partnership. He joined the partnership center in 2000 and uses skills he honed during his 25-year career as a NASA geologist. In 1965, he was a candidate for NASA’s Scientist Astronaut Program, made the finals, but wasn’t selected to fly. He went on to help other space explorers, from 1976 until 1990 as the director of the Solar System Exploration Division and from 1990 to 1995 as the chief scientist for the Human Exploration Program ? both at NASA’s Johnson Space Center in Houston.

“We can’t take everything to the Moon or Mars with us,” Duke says. “Today, it would take about 100,000 dollars to get a couple pounds of material moved from Earth to the Moon. So making propellant on the Moon would make trips back to Earth or on to Mars less expensive.”

Before you can process the lunar soil and turn it into rocket propellant or other useful materials, you have to figure out a way to mine it. For four years, Duke and a team of graduate students have been working on a robotic excavator. They built a prototype that weighs around a hundred pounds and has a chassis similar to the NASA rovers ? Spirit and Opportunity ? on Mars now. An arm-like boom extends from the vehicle’s front end. It sports a wheel of buckets that scoop up soil. The dirt falls out of the buckets and into a conveyer system that takes it up the side of the boom. The arm moves from side to side and excavates a swath of dirt one and a half feet wide, the width of the excavator.

The current model can dig up several hundred pounds of dirt in an hour, but the team is working to increase the excavation rate. They also are designing a system to shoot the dirt from the excavator to a “lunar dump truck.” The truck would carry the soil to a processing facility to extract hydrogen ? a component of the fuel that powers the Space Shuttle and could fuel a lunar rocket.

Duke and his students also have completed a model that identifies lunar resources and their potential uses. The team even examined how a company could make money on the Moon, and came up with a scenario for a “space filling station” ? where in-space tugs would be loaded with lunar-made propellants and used to boost communications satellites to high orbits.

Why is Duke concerned with space business ventures? Collaborating with industry to explore the solar system is one of the goals of the Research Partnership Centers managed by the Space Partnership Development Program at NASA’s Marshall Space Flight Center in Huntsville, Ala., for NASA’s Office of Biological and Physical Research, Washington.

“NASA’s Research Partnership Centers bring together industry, academia and government to advance exploration in space,” says Duke. “These collaborations are an effective way to create new technologies at lower costs.”

One of the aspects Duke most enjoys about his job is creating new opportunities for students to conduct original research that will help advance space exploration.

“I studied geology at Caltech because I loved California ‘s mountains and deserts,” recalls Duke, a Los Angeles native who earned his doctorate degree in 1963 from the California Institute of Technology in Pasadena. “But the university was a hotbed for planetary science, and my professors inspired me to study the geology of meteorites and the Moon. I want my students to become the next generation of scientists and engineers who take America to the Moon and beyond.”

One recent project that students helped design was the water mist investigation, conducted in space to examine how to fight fire with a fog-like mist of water ? instead of large amounts of water that can damage computers and other equipment. The STS-107 Space Shuttle crew completed the experiment during their January 2003 flight.

Although the experiment equipment was lost in the Columbia accident, the team received data from video sent back to Earth during the mission. They are using the data to design a space fire extinguisher for contained environments such as spacecraft, space habitats and submarines.

For more information visit:

http://www.nasa.gov

Center for Commercial Applications of Combustion in Space

http://www.mines.edu/research/ccacs/

Office of Biological and Physical Research

http://spaceresearch.nasa.gov/

Space Partnership Development Program

http://www.spd.nasa.gov

Original Source: NASA News Release

Image credit: ESA
In the course of its meeting in Kiruna (Sweden) on 24 and 25 March, the ESA Council approved the accession of Greece and Luxembourg to the ESA Convention.

The two countries are expected to become full members of the Agency by 1 December 2005, after their national approval procedures have been completed.

The Hellenic Republic officially applied to join ESA last October, the Grand Duchy of Luxembourg in December. The ESA Council unanimously approved both applications.

Greece and Luxembourg were granted observer status to attend meetings of ESA?s Council and all its subordinate bodies, to enable them to familiarise themselves with the Agency?s procedures and working practices.

Original Source: ESA News Release

Image credit: NASA
Expert witnesses before the House Science Committee today endorsed the broad outlines of the President’s space exploration initiative, but called for changes and refinements in some of its elements.

Specifically, several witnesses criticized the reductions proposed in NASA’s space science programs to pay for the initiative, and they urged NASA to come up with new ways to get fresh ideas into the program, including from entrepreneurs and the public. The witnesses also agreed that understanding and counteracting the effects of radiation in space on human physiology is one of the most serious hurdles to sustained human activity in space. Two of the witnesses argued that the moon might not be a sensible interim goal for the exploration initiative, but others endorsed the approach outlined in the President’s plan – first the space station, then the moon and then Mars.

Committee Chairman Sherwood Boehlert (R-NY) and Ranking Democrat Bart Gordon (D-TN) both emphasized their continuing concerns with the potential costs.

“I think all I need to say about my views this morning is to reiterate that I remain undecided about whether and how to undertake the exploration program. I would add that, as the outlines of the likely fiscal 2005 budget become clearer, my questions about the initiative only become more pressing,” said Boehlert.

Boehlert added that the fiscal 2005 NASA budget proposal needed to be reviewed in the context of the entire federal science budget. “My strong feeling, and I think it’s shared by others on this Committee, is that a society unwilling to invest in science and technology is a society willing to write its own economic obituary. So we’re looking in the broad category of science?and then NASA is a subset of that, and a subset of our investment in NASA is human versus unmanned. And so we’re trying to get answers to some very specific questions involving cost and risk – answers that are not easy to come up with.”

Gordon stated, “I support the goal of exploring our solar system. However, until I am convinced that the President’s plan to achieve that goal is credible and responsible, I am not prepared to give that plan my support.”

Witnesses had differing views on the costs. Dr. Michael Griffin, President and Chief Operating Officer of In-Q-Tel, said budget estimates of the cost of the President’s initiative – “$50-55 billion to rebuild a basic Apollo-like capability by 2020” – were overestimated. He noted this estimate was considerably higher than a 1991-1993 lunar outpost study he was involved in of which top-level cost estimates were about $30 billion in 2003 dollars, or 40 percent less than the President’s proposal.

Space and Aeronautics Subcommittee Chairman Dana Rohrabacher (R-CA) asked Dr. Griffin what he would “predict it would take us to go to the moon and then to go Mars?” Griffin answered, “I believe that the first expeditions to Mars should be accomplishable within an amount of funding approximately equal to what we spent on Apollo?in today’s dollars, about $130 billion. Certainly that would envelope it. I believe that it should be possible to return to the moon for in the neighborhood of $30 billion in today’s dollars. And those are both fairly comfortable amounts.” Griffin said those missions could “easily” be accomplished within those dollar amounts in 10 years, but “you would have to decide to do it and to allocate the money, but I think that’s the level of resource commitment that’s required.”

Dr. Donna Shirley, Director of the Science Fiction Museum and Hall of Fame in Seattle and former Manager of the Mars Exploration Program at NASA’s Jet Propulsion Laboratory said she thought Dr. Griffin’s numbers were “pretty good, provided that we do the stepping-stone to the moon and we don’t stop there and we don’t start building infrastructure and don’t start doing what we did with Space Station. If we go to the moon and then right on to Mars?those are not bad numbers.”

“I do not have the figures to either agree or disagree with Dr. Griffin’s. I do however fear that once committing to go back to the moon we’ll never make it to Mars,” added Dr. Laurence Young, Apollo Program Professor at the Massachusetts Institute of Technology and Founding Director of the National Space Biomedical Research Institute in Houston.

Dr. Lennard Fisk, Chair of the National Research Council’s Space Studies Board urged policymakers to consider a “learn-as-you-go” approach. “Deciding on these answers – how fast you go back to the moon, how much does it cost you, whether you go to Mars, is going to depend on each incremental step that we go?the moon appeals to me for the simple reason that we have an opportunity to go there and try out some of our technical solutions on the way and decide whether they’re going to be adequate?The cost of this thing should not – I don’t think we should try to find a number. We should try and find a number of what are the steps that we should take on which we learn something and we adjust our program to take the next logical step – incrementally walk through this thing,” said Dr. Fisk.

Mr. Norman Augustine, chair of the Advisory Committee on the Future of the U.S. Space Program and former Chief Executive Officer of Lockheed Martin, expressed his strong support for such a “stepwise” approach over such a long-term program. “If, for example, we are to pursue an objective that requires twenty years to achieve, that then implies we must have the sustained support of five consecutive presidential administrations, ten consecutive Congresses and twenty consecutive federal budgets – a feat the difficulty of which seems to eclipse any technological challenge space exploration may engender. This consideration argues for a major space undertaking that could be accomplished in step-wise milestones, each contributing to a uniting long-term goal?It is this consideration which justifies a mission to Mars with an initial step to the moon – as philosophically opposed to a return to the moon with a potential visit to Mars.”

Space and Aeronautics Subcommittee Ranking Member Nick Lampson (D-TX) noted, “Mr. Augustine states in his written testimony that ‘it would be a grave mistake to try to pursue a space program ‘on the cheap.’ To do so is in my opinion an invitation to disaster.’ I could not agree more.”

Young discussed one of the most difficult challenges facing human missions to the moon or Mars: the impact of spending long periods in space on the human body. Dr. Young stated, “Overall, the current suite of exercise countermeasures, relying primarily on treadmill, resistance devices, is unreliable, time consuming, and inadequate by itself to assure the sufficient physical conditioning of astronauts going to Mars. Radiation remains the most vexing and difficult issue.” He discussed some research being conducted, but noted much remains to be done. He also argued, “The proposal to limit [International Space Station] research to the impact of space on human health and to end support for other important microgravity science and space technology seems short-sighted.”

Shirley also expressed several concerns with the President’s plan, noting, “The costs of the program are difficult to evaluate but there appear to be several strategic flaws, including a possibly premature phase-out of the shuttle and premature focus on a specific approach. There is no real information on which to judge the impact of exploration on other NASA missions.” She recommended that the Administration revisit the nation’s space exploration goals and suggested a process including workshops and studies that would bring in a wide-range of new stakeholders and fully engage the public in the effort.

Original Source: House Committee on Science News Release

Image credit: Scaled Composites
The House of Representatives today approved legislation, sponsored by Space and Aeronautics Subcommittee Chairman Dana Rohrabacher (R-CA), designed to promote the development of the emerging commercial human space flight industry. H.R. 3752, The Commercial Space Launch Amendments Act of 2004, would put in place a clear, balanced regulatory regime to promote the industry while ensuring public safety. The legislation now heads to the U.S. Senate.

“Through our hearings and other work on the bill, I have come to see this as one of the most important measures this Committee will move this year,” stated House Science Committee Chairman Sherwood Boehlert (R-NY). “This is about a lot more than ‘joy rides’ in space, although there’s nothing wrong with such an enterprise. This is about the future of the U.S. aerospace industry. As in most areas of American enterprise, the greatest innovations in aerospace are most likely to come from small entrepreneurs. This is true whether we’re talking about launching humans or cargo. And the goal of this bill is to promote robust experimentation, to make sure that entrepreneurs and inventors have the incentives and the capabilities they need to pursue their ideas. That’s important to our nation’s future.” Boehlert’s full statement follows this release.

Rohrabacher noted, “It is my sincere hope that this bill will encourage individuals like Burt Rutan and others to continue leading the way in pushing the boundaries of technology and safety by building and flight testing hardware, something NASA has yet to do. This fine piece of legislation carries forward my goal of promoting this new industry and cutting back bureaucratic red tape, while protecting the public health and safety.”

“No one can say for certain whether commercial human space flight will become a major industry. However, I believe that the provisions in H.R.3752 will help nurture its growth while at the same ensuring that public health and safety are protected,” said Science Committee Ranking Democrat Bart Gordon (D-TN).

Major provisions of the legislation are designed to:

* eliminate any confusion about who should regulate flights of suborbital rockets carrying human beings by explicitly locating all commercial space flight authority under the Federal Aviation Administration (FAA) Office of Commercial Space Transportation (AST);
* make it easier to launch new types of reusable suborbital rockets by allowing AST to issue experimental permits that can be granted more quickly and with fewer requirements than licenses;
* extend government indemnification for the entire commercial space transportation industry (including licensed, non-experimental commercial human space launches) for a period of three years, but the bill will not grant indemnification for flights conducted under experimental permits, which will be more lightly regulated; and
* require a study on how best to gradually eliminate indemnification for the commercial space transportation industry by 2008 or as soon as possible thereafter.

Today’s House passage represents the culmination of a long and thorough process beginning last July with a joint House-Senate hearing, a Space Subcommittee hearing last fall and a policy roundtable with experts in the commercial space transportation industry late last year.

“Today, the U.S. House of Representatives has led the nation toward a significant next step in developing space and creating a major new economic engine for powering our nation’s economy. With the passage of HR 3752, the House has demonstrated real vision for America’s future in space. This bill helps define the critical framework for a commercial space regulatory process and authorizes the very important federal agency that is responsible for commercial space regulation. The leadership of both the House Subcommittee on Space and the House Committee on Science should be highly commended for their work in passing this bill,” said Tim Huddleston, Executive Director of the Aerospace States Association.

“H.R. 3752 is precisely the kind of legislation Congress should enact in order to give investors like me confidence that our space tourism ventures will be regulated in a fair and streamlined manner. I hope the Senate takes up this bill soon and sends it on to President Bush for his signature.,” stated Dennis Tito, the first space tourist in history.

Jeff Greason, President of Xcor Aerospace, a private rocket firm with goals of sending human beings into space said, “We think H.R. 3752 is very carefully crafted legislation which will help commercial human spaceflight develop in America. Confirming the FAA’s definition of suborbital flight, establishing a ‘fly at your own risk’ human spaceflight regime, and creating the new ‘experimental permit’ framework are all important steps which we fully support. We hope the bill moves through Congress swiftly retaining these key provisions.”

Original Source: House Committee on Science

An explosion at a solid fuel booster plant caused a large fire at the main Indian space complex; reports about the number of dead and injured are still coming in. ISRO Chairman G Madhavan Nair rushed to the Satish Dhawan Space Centre at Sriharikota to survey the damage and assist the recovery. Not more than seven people were known to be in the building. Three were sent to hospital with burns, and rescuers are searching for 3 more who were in the booster plant when the explosion occurred.

Image credit: NASA
NASA has a mystery to solve: Can people go to Mars, or not?

“It’s a question of radiation,” says Frank Cucinotta of NASA’s Space Radiation Health Project at the Johnson Space Center. “We know how much radiation is out there, waiting for us between Earth and Mars, but we’re not sure how the human body is going to react to it.”

NASA astronauts have been in space, off and on, for 45 years. Except for a few quick trips to the moon, though, they’ve never spent much time far from Earth. Deep space is filled with protons from solar flares, gamma rays from newborn black holes, and cosmic rays from exploding stars. A long voyage to Mars, with no big planet nearby to block or deflect that radiation, is going to be a new adventure.

NASA weighs radiation danger in units of cancer risk. A healthy 40-year-old non-smoking American male stands a (whopping) 20% chance of eventually dying from cancer. That’s if he stays on Earth. If he travels to Mars, the risk goes up.

The question is, how much?

“We’re not sure,” says Cucinotta. According to a 2001 study of people exposed to large doses of radiation–e.g., Hiroshima atomic bomb survivors and, ironically, cancer patients who have undergone radiation therapy–the added risk of a 1000-day Mars mission lies somewhere between 1% and 19%. “The most likely answer is 3.4%,” says Cucinotta, “but the error bars are wide.”

The odds are even worse for women, he adds. “Because of breasts and ovaries, the risk to female astronauts is nearly double the risk to males.”

Researchers who did the study assumed the Mars-ship would be built “mostly of aluminum, like an old Apollo command module,” says Cucinotta. The spaceship’s skin would absorb about half the radiation hitting it.

“If the extra risk is only a few percent? we’re OK. We could build a spaceship using aluminum and head for Mars.” (Aluminum is a favorite material for spaceship construction, because it’s lightweight, strong, and familiar to engineers from long decades of use in the aerospace industry.)

“But if it’s 19%? our 40something astronaut would face a 20% + 19% = 39% chance of developing life-ending cancer after he returns to Earth. That’s not acceptable.”

The error bars are large, says Cucinotta, for good reason. Space radiation is a unique mix of gamma-rays, high-energy protons and cosmic rays. Atomic bomb blasts and cancer treatments, the basis of many studies, are no substitute for the “real thing.”

The greatest threat to astronauts en route to Mars is galactic cosmic rays–or “GCRs” for short. These are particles accelerated to almost light speed by distant supernova explosions. The most dangerous GCRs are heavy ionized nuclei such as Fe+26. “They’re much more energetic (millions of MeV) than typical protons accelerated by solar flares (tens to hundreds of MeV),” notes Cucinotta. GCRs barrel through the skin of spaceships and people like tiny cannon balls, breaking the strands of DNA molecules, damaging genes and killing cells.

Astronauts have rarely experienced a full dose of these deep space GCRs. Consider the International Space Station (ISS): it orbits only 400 km above Earth’s surface. The body of our planet, looming large, intercepts about one-third of GCRs before they reach the ISS. Another third is deflected by Earth’s magnetic field. Space shuttle astronauts enjoy similar reductions.

Apollo astronauts traveling to the moon absorbed higher doses–about 3 times the ISS level–but only for a few days during the Earth-moon cruise. GCRs may have damaged their eyes, notes Cucinotta. On the way to the moon, Apollo crews reported seeing cosmic ray flashes in their retinas, and now, many years later, some of them have developed cataracts. Otherwise they don’t seem to have suffered much. “A few days ‘out there’ is probably safe,” concludes Cucinotta.

But astronauts traveling to Mars will be “out there” for a year or more. “We can’t yet estimate, reliably, what cosmic rays will do to us when we’re exposed for so long,” he says.

Finding out is the mission of NASA’s new Space Radiation Laboratory (NSRL), located at the US Department of Energy’s Brookhaven National Laboratory in New York. It opened in October 2003. “At the NSRL we have particle accelerators that can simulate cosmic rays,” explains Cucinotta. Researchers expose mammalian cells and tissues to the particle beams, and then scrutinize the damage. “The goal is to reduce the uncertainty in our risk estimates to only a few percent by the year 2015.”

Once the risks are known, NASA can decide what kind of spaceship to build. It’s possible that ordinary building materials like aluminum are good enough. If not, “we’ve already identified some alternatives,” he says.

How about a spaceship made of plastic?

“Plastics are rich in hydrogen–an element that does a good job absorbing cosmic rays,” explains Cucinotta. For instance, polyethylene, the same material garbage bags are made of, absorbs 20% more cosmic rays than aluminum. A form of reinforced polyethylene developed at the Marshall Space Flight Center is 10 times stronger than aluminum, and lighter, too. This could become a material of choice for spaceship building, if it can be made cheaply enough. “Even if we don’t build the whole spacecraft from plastic,” notes Cucinotta, “we could still use it to shield key areas like crew quarters.” Indeed, this is already done onboard the ISS.

If plastic isn’t good enough then pure hydrogen might be required. Pound for pound, liquid hydrogen blocks cosmic rays 2.5 times better than aluminum does. Some advanced spacecraft designs call for big tanks of liquid hydrogen fuel, so “we could protect the crew from radiation by wrapping the fuel tank around their living space,” speculates Cucinotta.

Can people go to Mars? Cucinotta believes so. But first, “we’ve got to figure out how much radiation our bodies can handle and what kind of spaceship we need to build.” In labs around the country, the work has already begun.

Original Source: NASA Science Story

Image credit: NASA
The flight of NASA’s X-43A has been postponed, due to an incident with the rudder actuator on the booster. On Feb 11, during setup at Orbital Sciences Corporation for testing of the rudder and its actuator, an anomaly caused the actuator to go hard over and hit its mechanical stop, exceeding the torque to which the units were qualified.

Although the actuator may still function normally, it will have to be replaced. A joint government/contractor incident investigation is under way to determine the cause and corrective actions.

Before this incident, the program was considering a delay of the flight to late March to retune the booster autopilot, to optimize its performance based on the latest test data. With the requirement for a replacement actuator, the two activities will now be done in parallel. Planning is now focused on a late-March to early-April flight.

The X-43A is a high-risk, high-payoff flight research program. Designed to fly at seven and 10 times the speed of sound, and use scramjet engines instead of traditional rocket power, the small, 12-foot-long X-43A could represent a major leap forward toward the goal of providing faster, more reliable and less expensive access to space.

The stack, consisting of the X-43A and its modified Pegasus booster, will be air-launched by NASA’s B-52 carrier aircraft at 40,000 feet altitude. The booster will accelerate the experimental vehicle to Mach 7 at approximately 95,000 feet altitude. At booster burnout, the X-43 will separate and fly under its own power on a preprogrammed path. The flight will take place over a restricted Navy Pacific Ocean test range off the coast of Southern California.

Original Source: NASA News Release