Posted on by Nancy Atkinson

Learning to Breathe Mars Air (Video)

Talk about dedication! Volunteers in Russia are testing the ability of humans to breathe argon-enriched air, as part of a research program that simulates a manned trip to Mars. Researchers want to know if humans can survive breathing air similar to that found on Mars. Of the experiment one Russian scientist said, “Our experiments show that argon combined with the right portion of oxygen is safe for humans. I tested it on myself and I’m OK, and volunteers are also doing fine.” Somehow, I’m not convinced about the rationale and safety of this test. This is preliminary research for the Russian Mars 500 project, which will simulate a manned Mars mission next year.

People will spend 520 days locked in a bunker-like habitation module, creating an environment like a real mission to Mars, which would take about that same amount of time, with round trip and a month spent on Mars.

For the current research, volunteers stayed inside a sealed capsule for ten days at a time, breathing a combination of argon, nitrogen, and oxygen. The TV news report below seems to advocate this type of research, saying that Western researchers “still use mice” for such experiments.

Especially reassuring is the scientist who keeps telling the test subjects, “Breathe calmly!” Take a look:

Original News Source: You Tube

Posted on by Nancy Atkinson

Solution to NASA’s Glove Problem

Damage is occurring to NASA’s spacesuit gloves during spacewalks at the International Space Station. In fact, in August of 2007, astronaut Rick Mastracchio was ordered back into the the space station’s airlock when he noticed a hole in his spacesuit glove. Damage had also been found on previous EVAs, prompting NASA to call for routine glove checks during spacewalks, which led Mastracchio to find the damage on his left thumb. Holes and extreme wear is occurring to the outer portion of the palm side of the glove. The folks at NASA’s Johnson Space Center have been working on the problem, and a newly re-designed glove will be tested during the upcoming STS-124 mission, scheduled to launch May 31. Their solution?


Super-duper patches. Two pairs of gloves will be tested during upcoming spacewalks with these patches on the index finger and thumb (the grey stripe on the finger and thumb.) Those tend to be the high-wear areas, said Brandi Dean at NASA’s Public Affairs Office at Johnson Space Center. The patches are made of the same protective material already used in the glove, Vectran, but the weave of the material is tighter in the patches, which improves its resistance to damage. There’s also an extra strip of the rubbery material used on the palm of the glove to improve grip.

The gloves have several layers. The layer that’s been damaged is just the top, protective layer. The bladder layer that actually keeps the suit pressurized hasn’t been damaged. “But,” said Dean, “we still take damage to that protective layer seriously, because once that layer is damaged, that area of the bladder doesn’t have the amount of protection we want to have.”

If everything works well during the flight test of these new gloves, the updated gloves will be used on the following space shuttle mission in October that goes to the Hubble Space Telescope.

But if the patches don’t work, maybe they can try something like this:


Ironman, Courtesy of Entertainment Weekly.

Posted on by Nancy Atkinson

Rumor Mill Churns With NASA’s Upcoming Announcement

This past Wednesday, NASA announced they have scheduled a press conference for next Wednesday, May 14, at 1 p.m. EDT, to reveal the discovery of an object in our galaxy that astronomers have been hunting for more than 50 years. This gives everyone an entire week to speculate, ruminate and in some cases go off the deep end about what the announcement will entail. On the internet the conjecture goes from logical (intermediate or supermassive black holes) to wacko (aliens, Planet X, or something to do with the Mayan calendar) to hilarious (the Death Star or socks lost in the dryer.)

NASA says the finding was made by combining data from NASA’s Chandra X-ray Observatory with ground-based observations, so some of those are obviously wrong (are socks visible in X-ray?).

We’re an impatient species, always wanting to know a secret and know it now, so NASA may have erred in giving us so much time to wonder. And surely, the news will leak out before the 14th because we’re also a species that likes to spill the beans.

To pass the time until the 14th, if you’d like to take a stab at what the announcement might be, post a comment. Intelligent and non-conspiracy theory guesses only, please.

Posted on by Nancy Atkinson

Gravity Anomaly Challenges MESSENGER Mission

Scientists from the MESSENGER mission continue to analyze the data from the spacecraft’s first flyby of Mercury on January 14, 2008. Initial data about the planet’s gravity field grabbed the science team’s attention, as the actual gravity data differed from predictions based on the Mariner 10 flyby in 1975. Any unknowns in Mercury’s gravity will provide challenges for the spacecraft’s navigation during the next flyby in October, and especially when MESSENGER goes into orbit of Mercury in 2011. This in turn could affect quality and detail of science observations. “There indeed are residuals that we have not yet been able to explain fully,” said Ralph McNutt, MESSENGER Project Scientist. “While we believe we have resolved possible extraneous effects, we continue to work those as well.”

The new data about Mercury’s internal structure is different from what the scientists expected. McNutt said that while it was surprising that the tracking data did not fit all of their preconceived notions from Mariner 10, MESSENGER went much closer to Mercury than did Mariner, which could account for the differences in data. Scientists believe there may be a large concentration of mass (mascons) under Mercury’s surface about 10 degrees south of the equator at about 60 degrees longitude. A presentation by team member David Smith at the Lunar and Planetary conference in March showed that they were able to account for about 95% of the problem deviation using a single mass anomaly at that location.

“This also leads into the most important thing on flyby 2,” said McNutt, “as we will have closest approach on the other side of the planet, we will then be able to obtain a much better separation of global versus local (mascon) signatures. So we expect major advances in our understanding of the gravity field from the 2nd flyby as it will complement the information gleaned from the first.”

From MESSENGER Navigation Team Chief Ken Williams’ perspective, any new information and understanding of this issue is important. “We’re following very closely any developments in understanding the gravity field,” said Williams. “As we encounter Mercury each time, we’re trying to build up our knowledge of what the gravity field is going to be. It’s not critical that we know it in fine detail right now, but obviously when we settle into orbit we’re going to want to know a lot more about it because that will affect the design of the orbit trim maneuvers that we’ll have to do.”

McNutt said the initial the command loads for the second flyby are being delivered to Mission Operations this week.

But Williams said the first flyby provided good news as far as knowing Mercury’s actual location in space. “While we had a pretty good idea of Mercury’s ephemeris, that fact that it hadn’t been visited by a spacecraft for a long time, there was a chance it would be different than we thought,” said Williams. “We did some things with optical navigation as we were flying by and it confirmed that it was only 2 km away at most from the ephemerides that JPL publishes. That was a great relief. That takes away the uncertainty for future encounters.”

MESSENGER’s orbit around Mercury will be affected by another perturbation, known as third body gravity, from the Sun’s gravity field. At first this effect will draw MESSENGER away from Mercury, but later in the mission it will force the spacecraft towards the planet. Williams said one navigation analyst estimated that if the mission ended in 2012 and no further maneuvers were done by the spacecraft, MESSENGER would impact Mercury sometime in 2016.

McNutt was clearly pleased with the data from the first flyby, and looks forward to the second. “The first flyby provided humanity’s first closeup of 21% of Mercury’s surface as well as an amazing set of data on the Caloris basin. We have also made major advances in our understanding of Mercury’s exosphere, magnetosphere, and surface mineralogy. The second flyby will provide a similar close-up of another 33% of terra incognita, and only ~1% of Mercury will not have been viewed by a spacecraft when we enter orbit in 2011.”

Posted on by Nancy Atkinson

NASA Flips for Petaflops

NASA is collaborating with Intell and SGI to create one of the world’s fastest supercomputers whose power will be measured in petaflops. By 2009 the US space agency wants to develop a computational system that will be able to do 1,000 trillion calculations per second. And by 2012 it hopes to have boosted the power of this machine to 10 petaflops, to help with modelling and simulation. NASA’s Advanced Supercomputing Division is calling the new project Pleiades, and it will be installed at the Ames Research Center in California, the site of its current supercomputer, Columbia, pictured here. The new computer would put NASA on the list of the top five fastest number crunchers in the world.

“Throughout its history, NASA has sought to explore the most compelling questions about mankind, Earth, and the worlds that await our discovery,” said Robert “Bo” Ewald, chief executive officer of SGI. “These groundbreaking new systems powered by SGI and fueled by the latest multi-core Intel processors, offer a platform for new discoveries that will help us all achieve the most promising future for the human race. This effort is important to everyone on this planet.”

NASA uses its current supercomputer to examine the performance of hypersonic aircraft, simulate lander deployments and model fabrics for future spacesuits.

“This additional computational performance is necessary to help us achieve breakthrough scientific discoveries,” said Pete Worden, Director at Ames.

Currently, the most powerful supercomputer on Earth is BlueGene/L which has a top speed of 478.2 teraflops.

Columbia was turned on in 2004 and has a theoretical peak of 88.88 teraflops. This makes it the 20th most powerful supercomputer on the planet, according to the Top 500 Project which compiles a list of the relative performance of these machines.

Petaflop computers are expected to debut in the next release of the Top 500 list which is due in June.

Quasi-supercomputing, where multiple computers are used using the BOINC platform has already achieved petaflop status. Folding@home, reported nearly 1.3 Petaflops of processing power in late 2007.

The largest BOINC project, SETI@home, reported processing power of over 450 teraflops through almost 350,000 active computers.

Original News Sources: BBC, NASA

Posted on by Nancy Atkinson

Long-term Observations Reveal Patterns in Saturn’s Atmosphere

Reading something like this makes me hopeful that we’re no longer in the infant stage of our understanding of our solar system: we’ve been patient and observant while growing in our knowledge. Scientists have discovered a wave pattern, or oscillation, in Saturn’s atmosphere only visible from Earth every 15 years. This discovery was made only because we’ve been studying Saturn from ground based telescopes for about 22 years. Combined with the Cassini spacecraft’s observations of temperature changes in the giant planet’s atmosphere over time, we’re gaining a better understanding of Saturn and discovering not only how unique it is, but also that Saturn has something in common with Earth. Our own planet has these oscillations too, and so does Jupiter. “You could only make this discovery by observing Saturn over a long period of time,” said Glenn Orton, of JPL, lead author of the ground-based study. “It’s like putting together 22 years worth of puzzle pieces, collected by a hugely rewarding collaboration of students and scientists from around the world on various telescopes.”

The image above shows a pattern ripples back and forth like a wave within Saturn’s upper atmosphere. In this region, temperatures switch from one altitude to the next in a candy cane-like, striped, hot-cold pattern. The temperature “snapshot” shown in these two images captures two different phases of this wave oscillation: the temperature at Saturn’s equator switches from hot to cold, and temperatures on either side of the equator switch from cold to hot every Saturn half-year.

The image on the left was taken in 1997 and shows the temperature at the equator is colder than the temperature at 13 degrees south latitude. Conversely, the image on the right taken in 2006 shows the temperature at the equator is warmer.

Results from Cassini’s infrared camera indicate that Saturn’s wave pattern is similar to a pattern found in Earth’s upper atmosphere, which takes about two years. A similar pattern on Jupiter takes more than four Earth years. The new Saturn findings add a common link to the three planets.

Cassini scientists hope to find out why this phenomenon on Saturn changes with the seasons, and why the temperature switchover happens when the sun is directly over Saturn’s equator.

Original News Source: JPL Press Release

Posted on by Nancy Atkinson

Popular Space Elevator Video Not “News,” says LiftPort Founder

An online video that’s been circulating like wildfire on the internet recently is actually almost two years old, says Michael Laine, founder of LiftPort, a company looking to develop a space elevator. The video was taken in the fall of 2006, at least 20 months ago.

The video has been downloaded over 200,000 times in the past few days, and has been extremely popular on sites like Digg. “I find the whole thing kind of a farce, actually,” said Laine. “I’m glad people are seeing it and commenting on it, but if someone thinks this is news, its not.”

The only reason Laine could site for a possible resurgence of this video is that last Friday, the Conan O’Brien show featured a guest talking about space elevators. Laine wonders if that led to people doing searches about the subject, finding this old video on You Tube, and re-posting it as “new.” Laine says LiftPort has received slightly more email than normal the past couple of days, but until now no one has contacted him to check on the authenticity or timing of the video.

“Everything in it is true, except the timing is strange,” said Laine. “Those are my quotes, (listed along with the video) but I don’t know how someone obtained them, and got that wording. What’s ironic is that we’ve done a lot of experiments since then. That specific test was supposed to be a mile high test, but we had problems with the ribbon snapping. The FAA required that we put markers on it, and the acetone used to mark it weakened the ribbon substantially. The test turned out to be 1,000 feet. We actually were very happy about the test, although we almost lost the ribbon.”

Laine was especially surprise to hear of this new interest in Liftport, since the company has gone through some hard times over the past year, losing investors, a building, and other support. Laine said he will have some positive news to report soon, so stay tuned.

And OK, here’s the video. (You Tube’s version, not LiveLeak’s!) It is pretty amazing.

Click here for more information about LiftPort.

Posted on by Nancy Atkinson

Volunteers Sweat for NASA

For three weeks, 23 volunteers spent time helping NASA test a new life support system for the spacecraft that will replace the shuttle. Five volunteers at a time would squeeze into a special room the size of a walk-in closet for eight hours. Sweating and heavy breathing was encouraged, as scientists at Johnson Space Center wanted to measure the amount of moisture and carbon dioxide absorbed by a new system designed to control carbon dioxide and humidity inside a crew capsule in order to make air breathable and living space more comfortable. The tests took place from April 14 to May 1 of this year and are some of the first to use human subjects in support of NASA’s Orion crew capsule, Altair lunar lander and lunar rovers.

“We’re moving from paper studies to tests with hardware that will evolve and become part of the spacecraft that will fly back to the moon,” said test volunteer and NASA engineer Evan Thomas at Johnson.

Known as the Carbon-dioxide and Moisture Removal Amine Swing-bed, or CAMRAS, the new system will help sustain life on exploration vehicles and reduce the dependence on resupply from Earth.

“Our goal for CAMRAS is to develop a simple, regenerative, lightweight device that will work for both the Orion crew capsule and the Altair lunar lander,” said lead researcher Jeff Sweterlitsch.

The Exploration Life Support project also is developing technologies that will recover oxygen and water vapor, recycle spacecraft wastewater into drinking water and recover usable resources from wastes.

This series of tests put volunteers inside a test chamber scaled to be the size of the Orion crew capsule, about 570 cubic feet. The volunteers, who were selected and grouped to replicate a typical crew, were asked to sleep, eat and exercise during test sessions that lasted from a few hours to overnight.

“The air smelled a little artificial, like on a plane, and it was a little crowded,” said Aaron Hetherington, one of the volunteers and a director for the test. “But the air was fine; the temperature comfortable. My biggest observation is that it was unremarkable, which is good because that means the hardware was working.”

Two additional phases of testing on CAMRAS are planned.

Video of the tests are available on NASA TV

Original News Source: NASA Press Release

Posted on by Nancy Atkinson

The Space Traveler’s Guide to Surviving Without a Spacesuit (Part 1)

In a few decades from now, when we’ve got interplanetary space travel perfected and all of us Average Joes can hop in our own personal spacecraft or grab the local express line of the Milky Way Transport Service, visiting other planets and moons is going to be a blast. Just imagine it: kicking back for a relaxing weekend on Mars, or heading out for a diving expedition on Europa, or possibly week of mountain climbing on Titan. But there are a few safety rules we’ll need to know, especially in the event of a spacesuit failure. Unfortunately, unless someone is able to figure out how to do some serious terraforming, we’ll all be stuck wearing spacesuits in order to survive on the other worlds in our solar system. And just how bad would it be if your spacesuit malfunctioned? Well, let’s just say it wouldn’t be pretty. Here’s a look at some problems you might encounter without an operational spacesuit on other worlds.


We’ll start with Mercury. Lack of air is going to be a serious problem here if your spacesuit quits working. So far, no discernable atmosphere has been detected on Mercury, except for trace amounts of helium, so maybe you could amuse your companions by doing a Munchkin voice for a short while before you passed out. A spacesuit designed for Mercury would have to withstand high temperature fluctuations, as temperatures range from -150 C to 425 C. Without your spacesuit, you’d either freeze or instantly turn into a carbon briquette, depending on which side of the planet you were standing. Moving about on Mercury would be fairly easy, since the gravity is about 1/3 that of Earth, and Mercury has smooth plains, plentiful craters and high cliffs that would be fun to explore. But if you were stuck on Mercury with a malfunctioning spacesuit, it would be a very long bad day, since one day on Mercury is equal to 59 days on Earth.


Venus. Why anyone would want to visit Venus is a mystery. It’s too hot, too cloudy and the atmospheric pressure is downright depressing. A spacesuit designed for Venus would need to be constructed of titanium or some other material that could withstand Venus’ high surface pressure, which is 90 times that of Earth’s. Without a strong spacesuit, you’d be instantly squashed. The Russians tried several times to land a robotic spacecraft on Venus, and most never made it to the surface without being crushed. The Venera 8 lander, however, lasted 50 minutes. So, if your titanium-strength spacesuit was working, and you, too could survive for at least 50 minutes, there are 1600 major volcanoes, lots of mountains, large highland terrains, and vast lava plains to explore. Before landing on Venus, you’d want to do a thorough checkout of your spacesuit’s Primary Life Support Subsystem (PLSS) which contains oxygen tanks, carbon dioxide scrubbers, cooling water, communications, and ventilating fans. You’ll need all of those things to be working at peak efficiency. Venus’ atmosphere is mostly carbon dioxide (96%), with some carbon monoxide and sulfur dioxide thrown in just to keep the riffraff out. Suffice to say, without a spacesuit, you wouldn’t last long and you might not even make it to the surface. And a bad day on Venus would be even worse than on Mercury: it’s about 230 Earth days long.


If you plan just to take a day trip and visit our Moon, you’re probably going to be in pretty good shape, as we’ve had the chance to thoroughly test out spacesuits designed for the lunar surface. Again, you’re going to need your PLSS, since there’s no air on the moon. Just the opposite of Venus, there’s no air pressure on old Luna, so you’ll need your spacesuit to keep your innards inside your body. Surface temperatures can vary dramatically over the course of a day, from 100° C at noon to -173° C at night, so a malfunctioning spacesuit might cause a predicament. But hopefully there’ll be a moon base just around the corner if you run into any problems.

Let’s head back to the safety of Earth now before we head on out to the rest of our solar system.

Sources: (9) 8 Planets, Windows to the Universe

Posted on by Nancy Atkinson

Snow on Mercury?

No, not that kind of snow, but scientists say deep inside the planet Mercury, iron “snow” forms and falls toward the center of the planet, much like snowflakes form in Earth’s atmosphere and fall to the ground. The movement of this iron snow could be responsible for Mercury’s mysterious magnetic field, and Mercury may be the only body in our solar system where this occurs.

Mercury and Earth are the only local terrestrial planets that possess a global magnetic field. But Mercury’s is about 100 times weaker than Earth’s, which scientists have been unable to explain.

Made mostly of iron, Mercury’s core is also thought to contain sulfur, which lowers the melting point of iron and plays an important role in producing the planet’s magnetic field.

To better understand the physical state of Mercury’s core, the researchers in a lab recreated the conditions believed to exist at Mercury’s core, and melted an iron-sulfur mixture at high pressures and high temperatures.

In each experiment, an iron-sulfur sample was compressed to a specific pressure and heated to a specific temperature. The sample was then quenched, cut in two, and analyzed with a scanning electron microscope and an electron probe microanalyzer.

As the molten, iron-sulfur mixture in the outer core slowly cools, iron atoms condense into cubic “flakes” that fall toward the planet’s center, said Bin Chen, University of Illinois graduate student and lead author of a paper published in the April issue of Geophysical Research Letters. As the iron snow sinks and the lighter, sulfur-rich liquid rises, convection currents are created that power the dynamo and produce the planet’s weak magnetic field.

The researchers say their findings provide a new context for the data that will be obtained from NASA’s MESSENGER spacecraft, which will flyby Mercury for a second time on October 6, 2008. It will pass by the planet again in September of 2009, and go into orbit in March of 2011.

Original News Source: Eureka Alert

Here are some interesting facts about Mercury.