Phoenix shakes and bakes

After a tense few days for mission scientists, when it seem possible that the primary science experiment on the Phoenix lander would fail, it has been announced that a soil sample has been successfully delivered to Oven number 4, and that testing is to begin with the TEGA (Thermal and Evolved Gas Analyzer). The landing and deployment of Phoenix's robotic arm had gone flawlessly, but when a first sample of Martian soil was scooped up and delivered to the Oven, problems began. The experiment is designed to allow only a small amount of fine material into the Oven, but it looked like the Martian soil was so densely clumped that it was unable to pass through the filter to the Oven. NASA scientists sent several commands to try and shake the soil through, but these appeared to fail. After six attempts there was no luck, but then scientists rechecked the oven and found that against all expectations, it was full. Speculation is that the cumulative effect of the shaking or some changes to the cohesiveness of the soil unclogged things, but thankfully the mission is now back on track.

Mars Phoenix lander touches down

JPL scientists were jumping for joy today when the Mars Phoenix lander completed a flawless touchdown in the unexplored far north of the red planet. Designed to search for evidence of the necessary conditions to support life, the probe has already returned the first photographs and will deploy a robotic scoop to examine soil samples. Touchdown was confirmed by a signal at 2353 GMT on 25 May (1953 EDT; 0053 BST on 26 May). The first photographs show an extremely flat Arctic plain, with little in the way of the rocks, boulders and rough terrain encountered by the Spirit and Opportunity rovers.

Super powered sands of Mars explained

It may be that Martian sand particles are a cut above the average. Murilo Almeida, a physicist at the Federal University of Ceara in Brazil is proposing that a process called saltation may explain why huge sand storms can be whipped up on Mars, despite the fact that wind speeds seldom pick up sufficient energy to power them. The saltation process is effectively a chain reaction, as dust particles crash into the surface, kicking up yet more dust. Using computer modeling, Almeida and his team found that sand grains on Mars have super powers, leaping a hundred times higher and longer than their puny counterparts on Earth, while reaching speeds five to ten times faster than sand on Earth.

Salt shakes up life debate on Mars

Last month salt was the villain in the on again, off again debate about the possibility that life may once have existed on Mars. Then it was a case of too much salt, but recent observations from the orbiting Mars Odyssey probe have uncovered chloride salts at more than 200 locations in the Red Planet’s southern hemisphere and this time it seems to be the right kind of salt. No mention is made of the earlier negative results obtained by the Opportunity Rover, and the reports, carried by publications such as the British Times newspaper and National Geographic are extremely upbeat for the case that these deposits are prime sites for life to have taken hold. Paul Knauth, a geologist at Arizona State University is reported to be particularly excited about the discovery, and has gone so far as to say that some of the 3.8 billion year old deposits may still yet be "actively oozing." An excellent article goes into depth regarding this theory at National Geographic.

Massive water deposits spotted on Mars

Evidence presented at the 39th Lunar and Planetary Science Conference here in Houston, Texas indicates that significant volumes of water ice have been discovered in Mars' mid-northern latitudes. The Sharad radar experiment on Nasa's Mars Reconnaissance Orbiter (MRO) has been looking at distinctive geological features called lobate debris aprons (LDAs). These dome-shaped structures are concentrated around the mid-latitudes in the planet's northern and southern hemispheres. By penetrating the domes with the Sharad radar, scientists were able to judge their geological makeup. Very little attenuation (reduction in signal strength) was detected, suggesting they were predominantly made of ice. Commenting on the likely concentration of water bound up in the features, lead scientist Dr Jeff Plaut estimated, "robustly, more than 50% ice by volume - but it could be much more." The ice is thought to have formed during the mid to late Amazonian era, the cold, dry period of Martian history which began around 1.8 billion years ago and lasts to the present day.

Holden crater - cup of life?

It may have have only held water for a few thousand years, but evidence gathered by the High Resolution Imaging Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter may well show that life had a chance of finding a foothold in Holden crater. The HiRise camera has spotted a jumble of house-sized rocks, called megabreccia, in the 154-kilometre-wide Holden Crater. They were probably formed in the impact that created the crater, but a spectrometer on MRO, called CRISM has discovered that the rocks are covered by layers of fine sediments and clay. Such material forms through prolonged contact with water. The evidence points to two wet periods in the history of the crater. The first would have lasted several thousands years, then later water from a network of large channels called the Uzboi Vallis system inundated the surrounding landscape. The crater wall held back the water for a time, before it rose high enough to flood the interior. This wet period would have lasted several hundred years, but it was this rapid flood that scattered the megabreccia and exposed clay that had been covered over by sediments from the first lake. Holden crater is one of 6 prime landing sites under consideration for the 2009 Mars Science Laboratory, and this discovery is sure to increase its chances of selection.

Pouring salt on Mars

The continuing seesaw of evidence for and against life on Mars (past or present) took another swing back toward the negative today when NASA announced new findings from the Opportunity rover. While both rovers on Mars continue to accumulate compelling evidence that the planet was once awash with water, the data from Opportunity seems to suggest that this water would have been very salty and acidic, which would be far from ideal for live to prosper. However, let's not get too despondent. News stories published today all seem to be keen to headline the negative, but read the details and it's not at all cut and dry. Yes, the water would have been pretty nasty, but Rover team member Dr Andrew Knoll is reported as saying "It was really salty - in fact, it was salty enough that only a handful of known terrestrial organisms would have a ghost of a chance of surviving there when conditions were at their best." So not a slam-dunk for the absence of life. Something could have survived, and lets not forget either that Opportunity has surveyed a tiny fraction of the land surface of Mars. Were an alien probe to land in some of the truly inhospitable locations on earth, it would send back gloomy messages as well. This case is definitely not closed.

Nicolas Sarkozy urges Mars vision

Visiting the Ariane rocket launch site in French Guiana, French president Nicolas Sarkozy urged great international cooperation on a Mars mission. Said Sarkozy, "I am convinced that an exploration programme can only be global, without exclusivity or appropriation by one nation or another... Each will be able to take part with their capabilities, their strengths and their choices." Sarkozy pointed out that Europe boasted "skills in robotic exploration, transport and technology", while the US had the dollars and would bring "technical and scientific competences" to the project. Sarkozy said he would ask the ESA and European Union to "co-operate on a framework for dialogue with the US and other space powers on a joint initiative".

Cooperation needed for Mars

A conference of 50 astronauts, public interest advocates, aerospace industry executives and scientists meeting at Stanford University have urged the US government to consider greater co-operation with space faring nations if the goal of sending humans to Mars is to be achieved by the early 2030's. According to figures released by the conference, the US is about 3 billion dollars a year short of the needed funds to achieve its aims. Plans to return first to the Moon were also criticised as a distraction from the greater goal of sending humans to Mars.

Have we photographed a Martian?

An extraordinary imaged snapped by NASA's Spirit rover on Mars has set the Internet abuzz with theories as to what it really shows. Undoubtedly it is perplexing picture, though it took an eagle-eyed Internet blogger to spot the tiny detail. Blown up, what you see looks exactly like a person striding across the Martian surface, but is that really what it shows, or is it just a trick of light, shadow and perspective. For my two cents, clearly it looks nothing like the Martians that H.G. Wells wrote about, so it can't be the real deal. Others have speculated it's bigfoot (on vacation?) or Osama Bin Laden. NASA is said to be puzzled, but apparently no one from NASA has actually commented, and I don't imagine they will. There is a dedicated band of armchair explorers who have irked NASA over the years by picking out tiny details from Martian photographs, everything from signs of standing water, to vegetation and details of old masonry and statues. Perhaps that's what this is, an old statue from a long dead Martian civilisation. It's a lovely thought, but alas I think this will turn out to be a red heron. It seems highly unlikely that two legged upright beings are somehow surviving on Mars, unless of course it's not a Martian. Could it be an American astronaut sent there in some ultra secret black budget anti gravity spacecraft, or even an alien from another star system out for a stroll, having parked his flying saucer over the next ridge? See, even I'm at it now.

You can see the full image at this site, but here's a close up for you.

Czech artists face jail over television fake

An extraordinary highjack of a Czech weather television broadcast might land a group of maverick artists in Jail. Echoing the 1938 War Of The Worlds broadcast, viewers were stunned to see a nuclear mushroom cloud rise over a mountain during a live weather broadcast. The imagery is incredibly realistic, but was a complete fake inserted by the Ztohoven collective artists group, who are thought to have hacked into the television signal. They have now been charged with scare mongering and propagating false information, and if found guilty could face three years in jail. In a statement Ztohoven said:

"We are neither a terrorist organization nor a political group, our aim is not to intimidate the society or manipulate it, which is something we witness on daily basis both in real world and in the world created by the media.Whether the reasons are political interests, market interests, financial interests or interests of supranational companies – we meet hidden manipulation and attempt to invade the subconscious mind of citizens with specific products or ideology, using all available means. We do not think that a subtle distortion of such system or an appeal to pure common sense of people and their ability to remain unaffected are harmful, not even in a democratic society. That is why, several years ago, the art group “Ztohoven” penetrated the public sphere of Prague, questioned the space given to advertisement generally and the space given to specific adverts. On the 17th of June 2007 this group attacked the space of TV broadcasting. It distorted it, questioned its truthfulness and its credibility. It drew attention to the possibility of using images of the world created by the media in place of the existing, real world. Is everything we see daily on our TV screens real? Is everything presented to us by the media, newspapers, television, Internet actually real? This is the concept our project would like to introduce and remind of. We believe that even the free space of public service broadcaster is able to endure such action and such impeachment. We hope our action will become an appeal for the future and remind the media of their duty to bring out the truth. Thank you for independent media and free space for our society."

Unfortunately for their artistic aims, it appears that several viewers suffered heart attacks, believing they were watching the beginning of a third world war. You can watch the footage at the BBC.

Possible active Glacier discovered on Mars

The European Space Agency's (Esa) Mars Express spacecraft has spotted what appears to be an active Glacier on the Martian surface, located in the Deuteronilus Mensae region between Mars' rugged southern highlands and the flat northern lowlands. While Glaciers have been identified before on Mars, previous sightings have been of very old formations (in the region of millions of years old.) This newly identified Glacier may only be several thousand years old. Distinctive glacial ridges have been spotted with white tips that can only be freshly exposed ice. This is an extremely rare occurrence, since as soon as water is exposed to the Martian atmosphere, it sublimates (turns from a solid state directly into gas). More detail can be found at the BBC News website.

NASA delays 2011 mission

Mystery surrounds a decision by NASA to disband a board whose job it was to select the winning proposal for the $475 million Mars atmospheric probe. Citing a serious conflict of interest, NASA disbanded the original board and formed an entirely new one. The administrative delay means that the mission schedule has slipped and the probe will not be able to launch until 2013. NASA is keeping the precise nature of the problem to itself because revealing details would compromise the selection process, saying only "In preparing for the evaluation of Mars Scout Concept Study Reports for the final selection, NASA identified an organizational conflict of interest. NASA determined action had to be taken to resolve the conflict in order to maintain a fair competition."

Mars lining up for impact in 2008

A 100-meter wide asteroid with the destructive potential of the infamous 1908 Tunguska impact has been detected on a possible collision course with Mars. The odds are 75 to 1 that the asteroid, designated 2007 WD5, will hit Mars by January 30th, but on cosmic terms, this adds up to an incredibly close shave for the Red Planet. If it does hit, the impact will be barely visible from Earth even through powerful telescopes, but several orbiting probes may well be able to see something when it slams into an area near Martian equator. Rather worryingly, the impact is likely to be close by Nasa's long lived Opportunity rover.

Greenhouse solution to Martian water mystery

The abundant evidence accumulated over recent years for the existence of a water rich atmosphere in the distant Martian past has been vexing scientists. While some clues point dramatically to water having once existing on the surface, other evidence flatly contradicts it. The problem may be that in trying to reconcile the evidence, we have been applying an Earth-like process to Mars when in fact we need to be thinking of something uniquely Martian. The key problem is that probes have uncovered plenty of sulphur minerals on the surface but no limestone as on Earth. The two should go hand in hand, since on Earth, Silicate rocks remove carbon dioxide from the atmosphere and with water to hand, convert it into calcium carbonate, commonly known as limestone. The lack of limestone has been particularly puzzling, but now a new theory suggests that sulphur dioxide may have taken the place of carbon dioxide. On Earth, sulphur dioxide is quickly oxidised to sulphate, but on an early oxygen poor Mars, the sulphur dioxide would have lingered in the atmosphere for much longer, acting as a greenhouse gas and warming the planet. It's a neat theory, and may finally prove the conclusive step in our understanding of the early Martian atmosphere. More can be read at the BBC website.

NASA outlines Mars mission timeline

NASA has begun to outline some of the specifics of its plan to put a human presence on Mars. The proposed mission vehicle is going to weigh in at a hefty 400,000kg (880,000lb) and is intended to put a "minimal" crew on the surface in 2031. Three or four of NASA's new Ares V rockets will be needed to loft the ship into space, which will require assembling in orbit. An advanced cryogenic fuel propulsion system would propel the mission to Mars on a six to seven month voyage. A cargo lander and surface habitat would be dispatched ahead of the crew vehicle and astronauts will be expected to grow their own fruit and vegetables during their trip. The mission will require an unparalleled degree of expertise from the astronauts, who will be required to respond to any likely situation or emergency far from any possible help. The plan as outlined is still extremely tentative and very likely subject to change, but with other countries eyeing the red planet, the coming decades are shaping up to be very exciting.

Spirit breaks free from Tartarus sand trap

NASA mission specialists are racing against time to get Spirit into the optimum position to survive the long Martian winter, but thought they might be in trouble when the rover got itself stuck in a sandy area they named "Tartarus" after a deep, underworld dungeon in Greek mythology. The rover is now free, but has about 25 metres more of equally difficult terrain to cross before it reaches a slope, which it is hoped will provide an optimum spot to soak up enough sunlight to survive the winter.

China sets launch date for Mars probe

China is shaping up to be one of the big players in space exploration and has am ambitious set of missions on the drawing board. Newly announced is a launch date for a Mars Orbiter. A final name for the probe has yet to be decided, though the China Daily is calling it Yinghuo-1, which appears to translate as Firefly. The 100kg probe will be lofted into orbit on a Russian launch vehicle in October 2009, marking a new closeness with Russia. Yinghuo-1 is expected to spend a year in orbit about Mars, but the mission has the potential to be extended by a further year. The probe will conduct a variety of scientific observations and return images of the planet.

Spirit bedding down for Winter

In what has become a regular yearly occurrence, the Spirit rover is looking for a comfortable warm spot to spend the Martian winter. Spirit is heading toward a north-facing slope, where it is hoped the rover can eke out enough sunlight to keep its systems ticking over until Summer. A number of such slopes were considered and rejected, and Spirit is now heading toward a particular promising one at the northern end of Home Plate, an intriguing geologic feature that had taken up several months research time for the rover. The 60-meter drive is worth the risk, as the slope provides a 25-degree incline that will maximise the available sunlight. Spirit can't afford to be cavalier about where it hunkers down for winter. After a long dust storm, the solar panels are covered in dust, so every extra bit of power will be crucial to survival this year. Unlike the rover’s sister Opportunity, they cannot count on a lucky gust of wind to clean the cells. Opportunity is in a windy locale; the area that Spirit is traversing now is almost windless. It is hoped that Spirit can be bedded down by the 1st January 2008, but it may then have to stay under cover for eight months.

Mars Express orbiter probes Medusae Fossae

The European Mars Express orbiter has been looking beneath the surface of Mars, at a particularly odd area known as the Medusae Fossae. The Medusae Fossae roughly forms the divide between lowland and highland regions along the Martian equator and has long intrigued geologists because the material it is composed of has been seen to absorb radar waves, leading to them been referred to as called "stealth" regions. Until now, no one has been sure how thick these deposits are, or what they might be composed of. The only reasonable certainty is that the material is relatively new, at least in a geologic sense, as there is little sign of disturbance by impact craters. Now the Mars Express Orbiter, which uses longer wavelengths than Earth-based radar experiments, has been able to make some intriguing observations.

The material it turns out is in places up to 2.5 kilometres (1.4 miles) thick in places, but there is still some uncertainty as to their composition. They could be volcanic ash deposits from now-buried vents or nearby volcanoes, or perhaps deposits of wind-blown materials eroded from Martian rocks. Most excitingly, they could be ice-rich deposits, somewhat similar to the layered ice deposits at the poles of the planet, but formed when the spin axis of Mars tilts over, making the equatorial region colder. Unfortunately, this later scenario seems the most unlikely, as the water vapour pressure on Mars is so low that any ice near the surface would quickly evaporate. The electrical properties of the layers suggest that they could be poorly packed, fluffy, dusty material, but this also has its detractors, since if it hard to understand how 2.5 kilometres of dust could retain such a lose composition. So the mystery of the Medusae Fossae endures, but we are step closer to understanding it.