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You can’t cancel an enormous federal program without hitting pushback, and President Obama is hitting plenty of it over his proposal to end NASA’s Constellation program. In January his budget proposal put forth no funding for Constellation, the space shuttle successor program that included the Ares rockets, Orion crew capsule, and plans to send astronauts back to the moon by 2020. Instead, NASA would become more reliant on private companies to ferry its astronauts to the space station, and would explore new ideas for visiting Mars or nearby asteroids. But the proposal has already ruffled lots of feathers, prompting the President to say he will hold a conference to further outline his plan.

First, many high-profile space experts balked at the proposal. Former astronaut Tom Jones said Obama was surrendering human spaceflight, and Apollo 17 astronaut Harrison Schmitt, one of the last men to walk on the moon, was equally displeased. “It’s bad for the country,” Schmitt said. “This administration really does not believe in American exceptionalism” [Washington Post]. Dissent wasn’t universal; DISCOVER blogger Phil Plait, for one, praised the possibilities for commercial space-faring.

But even getting the new plan in place will take plenty of political wrangling. Last week reports surfaced saying that NASA chief Charles Bolden and others inside the agency were quietly preparing a Plan B, with compromise options for the members of Congress who have objected to the President’s plan. When the news reports came out, however, Bolden flatly denied them. “The president’s budget for NASA is my budget,” General Bolden said. “I strongly support the priorities and the direction for NASA that he has put forward” [The New York Times].

One of the unhappy members of Congress is Senator Kay Bailey Hutchison of Texas. Hutchison, whose home state is one that stands to lose jobs when NASA’s space shuttle program ends, tried to thwart the Obama plan last week by introducing a bill to extend the shuttle for two more years (It’s currently due to retire this year). The bill, dubbed the Human Space Flight Capability Assurance and Enhancement Act, calls for spending an additional $3.4 billion between 2010 and 2012 to keep the space shuttle flying. It would require NASA to spread out its four remaining shuttle missions, now slated to wrap up by October, and potentially add additional flights [MSNBC]. Yesterday, shuttle program manager John Shannon said it could be done—if the country is willing to spend the money. It currently takes $200 million every month to maintain the shuttles.

Not everyone greeted the President’s proposal with sour grapes. Private space companies like Elon Musk’s SpaceX, for whom the move would mean more opportunities, are understandably excited. “It’s a huge move, and in the face of a lot of congressional opposition,” Musk said when DISCOVER spoke to him for a piece in the upcoming May magazine issue. Constellation, he argues, was never going to to reach it goals. It was already vastly underfunded, and would have required an infusion of cash that Americans would never give, especially in the current economic climate. “The people that are really hardcore against the cancellation of Constellation are people who, either from a political standpoint, have a ton of money being spent in their district and they don’t really care whether this succeeds or not,” he says.

Trying to get back on top in the public relations war, Obama announced this week that he would give a conference on April 15 in Florida to spell out more of his NASA vision. Senator Bill Nelson, Democrat of Florida, said he hoped Mr. Obama would use the meeting to lay out a goal and a timetable for sending astronauts to Mars [The New York Times]. Nelson, who flew on a space shuttle mission in the 1980s, is a political ally of the President’s, but represents Florida, where so much of NASA’s human spaceflight program is based. The key to political victory for Obama, he says, may be overturning the idea that the end of Constellation equals the end of ambitious manned spaceflight.

Image: NASA

Source: Obama’s NASA Plan Draws Furious Fire; The Prez Promises to Defend His Vision

FleaPlus writes “In light of Congressional resistance to the new plans for NASA (criticized as ‘radical’) proposed by NASA head Charles Bolden, Sen. Hutchinson (R-TX and ranking member of the Senate committee dealing with NASA) has proposed a compromise bill. Hutchinson’s bill calls for postponing the Space Shuttle’s retirement until 2015, and instead of wholly canceling Constellation/Ares, it would adapt the more effective portions to a ‘government-operated space transportation system,’ largely inspired by the DIRECT proposal. NASA would also pursue commercial crew and cargo launches to orbit, although the bill leaves out Charles Bolden’s proposal for R&D of ‘game-changing’ technologies for sustainable and cost-effective space exploration.”

Source: Shuttle Extension & Heavy Launcher Bill Proposed

astroengine writes “Mars has been visited by orbiters, landers and rovers, but could the future of Martian exploration be inspired by a wind-blown sphere? NASA and other research institutions have been developing the Mars Tumbleweed rover for the last decade, but with the help of the Planetary Science Institute, the Tumbleweed is now vying for some serious funding to further develop the technologies required. Although the Tumbleweed would be wholly dependent on the prevailing winds on the Martian surface, the lightweight and relatively cheap design could lead the way for a ’swarm’ of independent Tumbleweeds to explore vast regions of the planet (video link). In 2003 and 2004, NASA even tested an inflatable Tumbleweed prototype on Greenland and Antarctica — it traversed hundreds of miles with ease, continually relaying location and environmental data.”

Source: Could the Tumbleweed Rover Dominate Mars?

Stardust just can’t seem to stay out of the news. NASA’s comet chaser, named Stardust, returned a sample of celestial material to Earth in 2006 that has produced numerous fascinating findings. Those include the study we covered last week, in which scientists showed that materials that formed near our sun made it out to the far reaches of the solar system to collect on comets. This week, it’s not NASA astronomers making the headlines, but rather citizen scientists who appear to have found the first evidence of interstellar dust in the Stardust samples.

Stardust’s main mission was to gather material from the comet called Wild 2. But on the way, the team deployed a secondary panel of aerogel to try to catch interstellar dust. The researchers hoped to catch 100 or so interstellar grains from the weak but continuous flux in open space. The elements in these grains were forged in stars, but coalesced into grains in the empty space between stars [Nature News]. However, there’s much less dust in interstellar space than there is in a comet tail, and it moves faster, making it harder to catch. When scientists started looking at the sample dropped down to the Utah desert in 2006, it wasn’t clear if Stardust had nabbed any interstellar dust at all.

So NASA called in reinforcements, starting the Stardust@Home project in 2006. Over the last four years, “dusters” scanned millions of tracks in the sample looking for these grains. The first winner was Canadian Bruce Hudson, who named his grain “Orion.” Hudson suffered a stroke in 2003, and he turned to the Stardust@Home project in 2006 as a productive way of passing the time. For a year or so, he spent as much as 15 hours a day scanning thousands of pictures, five seconds per slide [Nature News]. Two probable dust particles have been found thus far.

Orion, say the Stardust researchers who checked it out, is glassy and rich in aluminum. Andrew Westphal of the University of California, Berkeley who announced the find, said the project leaders would use the discovery to try to fine-tune the search for more. “The interstellar dust is fundamentally the stuff we’re made of” [Nature News], he says.

Image: NASA

Source: Citizen Scientists Find Interstellar Dust Retrieved From Space

Water, water, everywhere! Radar results from a lunar probe have revealed that the moon’s north pole could be holding millions of tons of water in the form of thick ice, raising the possibility that human life could be sustained on Earth’s silvery satellite, NASA scientists said.

A NASA radar aboard India’s Chandrayaan-I lunar orbiter found 40 craters, ranging in size from 1 to 9 miles across, with pockets of ice. Scientists estimate at least 600 million tons of ice could be entombed in these craters [Wired].

Scientists estimate that this amount of water could easily sustain a moon base, or, if the oxygen in the ice was converted to fuel, could fire one space shuttle per day for 2,200 years. Last year, scientists found almost 26 gallons of water ice on the moon’s south pole, by crashing a rocket hull into a cold, dark crater. The crash produced a plume of material that provided evidence of water ice on the moon’s surface.

The craters which house the water deposits at both the north and south poles of the moon are extremely dark, cold, and most never catch any sunlight. Temperatures in some of these permanently darkened craters can drop as low as 25 Kelvin (-248C; -415F) — colder than the surface of Pluto — allowing water-ice to remain stable [BBC]. Presenting the findings at a major planetary science conference in Texas, Paul Spudis of Houston’s Lunar and Planetary Institute said the ice at the north pole could be buried under a layer of lunar soil, which may have prevented it from being vaporized even in crater regions that are exposed to sunlight.

The findings, which will be published in the journal Geophysical Research Letters, are the strongest indication yet that the moon could sustain a human outpost. Says Spurdis: “Now we can say with a fair degree of confidence that a sustainable human presence on the Moon is possible. It’s possible using the resources we find there” [BBC]. But what a case of bad timing. The findings come just one month after the Obama administration proposed that NASA give up on its mission of returning to the moon by 2020.

So how does lunar water form? Scientists suggest that chemical reactions triggered by the solar wind, the fast-moving stream of particles that blows away from the sun, could be the source. In this method, the radiation would cause oxygen molecules already in the soil to acquire hydrogen. This means that there might not be obvious skating rinks of ice in the lunar craters, but instead so-called “adsorbed” water may be present as a fine film that coats soil particles. Other researchers have suggested that ice was delivered to the moon in comet and asteroid impacts.

But the findings are literally the tip of the iceberg, and lead to a host of further questions: How does the water move around? What percentage of the water is adsorbed molecules? What percentage is ice filling pore space? And what portion of it is the solid chunks that could nourish human exploration? [Nature blog] Researchers will have to keep investigating to find out.

Image: NASA

Source: Tons of Water Ice at the Moon’s North Pole Could Sustain a Lunar Base

After analyzing data from a radar device aboard last year’s Indian Chandrayaan-1 mission to the Moon, NASA scientists have found what they estimate to be 600 million metric tons of water ice in craters around the Moon’s north pole.
“Numerous craters near the poles of the Moon have interiors that are in permanent sun shadow. These areas are very cold and water ice is stable there essentially indefinitely. Fresh craters show high degrees of surface roughness (high circular polarization ratio) both inside and outside the crater rim, caused by sharp rocks and block fields that are distributed over the entire crater area. However, Mini-SAR has found craters near the north pole that have high CPR inside, but not outside their rims. This relation suggests that the high CPR is not caused by roughness, but by some material that is restricted within the interiors of these craters. We interpret this relation as consistent with water ice present in these craters. The ice must be relatively pure and at least a couple of meters thick to give this signature.”

Source: NASA Estimates 600 Million Metric Tons of Water Ice At Moon’s North Pole

Last month, we discussed news that President Obama’s 2011 budget proposal did not include plans to continue NASA’s Constellation program, choosing instead to focus on establishing a stronger foundation for low earth orbit operations. Unfortunately, as government officials prepare to shut down Constellation, they’re warning that it won’t be a quick or simple process due to the contracts involved. From the Orlando Sentinel:
“Obama’s 2011 budget proposal provides $2.5 billion to pay contractors whatever NASA owes them so the agency can stop work on Constellation’s Ares rockets, Orion capsule and Altair lunar lander. But administration officials acknowledge that this number is, at best, an educated guess. … Many inside and outside of the space agency, however, think the number is too low. The agency has signed more than $10 billion worth of contracts to design, test and build the Ares I rocket and Orion capsule that were the heart of Constellation. But government auditors said last year that the costs of some of those contracts had swelled by $3 billion since 2007 because of design changes, technical problems and schedule slips. How much NASA will owe on all those contracts if the plug gets pulled is unclear. Many of the deals are called ‘undefinitized contracts,’ meaning that the terms, conditions — and price — had not been set before NASA ordered the work to start. That means the agency will need to negotiate a buyout with the contractor — and that can be a long and painful process, according to government officials familiar with the cancellation process.”

Source: The Difficulty of Dismantling Constellation

An anonymous reader writes with this interesting bit of speculation: “NASA can put humanoids on the Moon in just 1000 days. They would be controlled by scientists on Earth using motion capture suits, giving them the feeling of being on the lunar surface. If they can achieve this for real, the results for science research of our satellite could be amazing.”

Source: Project M Could Send Every Scientist To the Moon, By Proxy

Since NASA’s Stardust mission returned in 2006 from its trip of billions of miles collecting the dust of a comet called Wild2 and dropped it samples down to Earth in the Utah desert, the samples have raised all sorts of questions about how comets formed and what the early solar system was like. In a study this week in Science, there’s a new surprise. Scientists say that the comet sample contains chemicals that must have formed in our home turf, the inner solar system.

Lead researcher Jennifer Matzel studies a tiny particle taken from Stardust’s sample, a piece just five micrometers across. In it her team found the mark of materials that would have formed under high temperatures. Matzel, who specializes in using the decay rates of radioactive chemical elements to assess ancient dates, determined that the Stardust particle must have crystallized just 1.7 million years after the oldest solid rocks in the solar system were forming [San Francisco Chronicle]. After that, the researchers says, the particle must have been flung out to the Kuiper Belt, the region of icy comets revolving around the sun at a distance far past Neptune.

Matzel doesn’t know for sure how this migration would have happened, but she’s excited about it. “The new and interesting thing about this paper is it’s the first time we’ve been able to get some estimate of the timing,” Matzel says. “Even though it’s a very old object and it formed very close to the sun, it had some longer history in the inner solar system before it got flung out to the comet-forming region” [Scientific American]. The trip would not have been easy. NASA’s Joseph Nuth notes that Jupiter would be forming by this time in the early solar system’s history, and that would have been a major obstacle that outwardly-migrating material would have had to overcome.

Once again, Stardust has proven to be great at providing the unexpected. Earlier findings showed that the comet’s cloud unexpectedly contains the same rocky materials as the asteroids that orbit the sun between Mars and Jupiter, as well as molecules of glycine, an organic compound essential for life [San Francisco Chronicle]. More hints about the early solar system probably await in the stardust it brought back.

And while the Stardust “mothership” successfully dropped its sample capsule to Earth in 2006, the spacecraft’s voyage isn’t done. Stardust is now on its way to the comet Tempel 1, the comet impacted by the Deep Impact spacecraft in 2005, where it will take photographs of the crater produced by that impact.

Image: NASA

Source: Study: Wild2 Comet Was Exiled From Inner Solar System to the Boondocks

An anonymous reader writes “A Senate science subcommittee clashed with NASA’s chief on Wednesday, saying the firm and the White House lacked a clear vision and goal for the program. Skeptical senators told the space agency that it should not just talk about plans, but set out to do something specific. Lawmakers expressed a bipartisan opposition to the agencies plans and the initiatives of the Obama White House.”

Source: Senators Blast NASA For Lacking Vision