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The rover Spirit has been dragging one wheel around the surface of Mars for some time. One of the resulting gouges revealed a mineral deposit which was probably caused by a hydrothermal vent. This implies a large amount of water was present when the vent was active.

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lgmac brings us a story about how NASA will bring information from the Phoenix Mars lander to the internet in the coming days. CIO Magazine speaks with JPL's chief knowledge architect and others about how they'll provide massive amounts of data from the lander to suit the needs of an audience ranging from professors to 8-year-olds. We've been discussing the Phoenix mission for quite a while now. The landing is on schedule for Sunday at roughly 5PM PDT. "'In previous missions, a system like this didn't exist and people were sharing images via external drives,' Bitter says. Some of the images are put up immediately and captioned, or sent to museum audiences, while others are made part of huge mosaic pictures that display the majesty of what the NASA spacecraft encounters, she says. In addition to the sheer volume of data that must be sifted through, challenges included the large, dispersed team, Holm says. 'The content management system has to be easy to use and agnostic,' she says, 'It's all about speed and accuracy of data.' Video on the Web represents one of the biggest changes for modern-day missions for the public, Holm says. 'There's a visceral response we get from people. They feel like they're really there.'"

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coondoggie writes "Turns out that the surface of Mars is stiffer and colder than previously thought. New observations from NASA's Mars Reconnaissance Orbiter indicate that any liquid water that might exist below the planet's surface and any possible organisms living in that water would be located deeper than scientists had suspected. NASA made the discovery while using the Shallow Radar (SHARAD) instrument on the Orbiter, which revealed long, continuous layers stretching up to 600 miles, or about one-fifth the length of the United States. The radar pictures show a smooth, flat border between the ice cap and the rocky Martian crust, NASA said. On Earth, the weight of a similar stack of ice would cause the planet's surface to sag. The fact that the Martian surface is not bending means that its strong outer shell, or lithosphere, a combination of its crust and upper mantle, must be very thick and cold."

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Several readers relayed the press release from JPL about the upcoming landing of NASA's Phoenix Mars Lander on May 25. It's going to set down in the north polar regions and look for indications of whether conditions have ever been favorable for microbial life. "Phoenix will enter the top of the Martian atmosphere at almost 21,000 kilometers per hour... In seven minutes, the spacecraft must complete a challenging sequence of events to slow to about 8 kilometers per hour... before its three legs reach the ground. Confirmation of the landing could come as early as 7:53 p.m. EDT. 'This is not a trip to grandma's house. Putting a spacecraft safely on Mars is hard and risky,' said Ed Weiler, associate administrator for NASA's Science Mission Directorate. 'Internationally, fewer than half the attempts have succeeded.'"

StonyandCher writes in about a collaboration between NASA and a leading Australian exploration and mining scientist, Dr. Brent McInnes, to search for signs of ancient life on Mars. The plan is to develop and miniaturize the "Alphachron" — an exploration technology currently employed by the Australian minerals industry to determine the age of minerals. If the Alphachron can be miniaturized, it could fly with the next rover mission set for launch in 2010. "The highest priority is to understand when liquid water was present on Mars. 'The same minerals that can be found in [Western Australia]... can also be found on Mars,' McInnes said. Accordingly, by using the Alphachron to date minerals on Mars and thus tell when liquid water may have been present, it can be inferred when life may have been sustainable near the surface of the planet."

mattnyc99 writes "Popular Mechanics is reporting that NASA — faced with the looming retirement of the space shuttle, and planning for longer missions like the one to Mars we've been discussing — is looking to free up its budget and depend a lot more on private space startups to carry key payloads into orbit in the next few years. For an agency so steeped in bureaucracy, it seems like everyone from NASA chief Mike Griffin to contracted officials to the key players in this in-depth podcast roundtable is finally acknowledging that commercial rocketeering (space tourists aside) is a more efficient means of getting back into space for NASA. Quoting: 'Because of a new focus for NASA's strategic investments — not to mention incentives like the Ansari X Prize, which spurred the space-tourism business, and the Google Lunar X Prize, which could do the same for payloads — private-sector spaceships could be ready for government service soon, says Sam Scimemi, who heads NASA's Commercial Orbital Transportation Services program. "The industry has grown up," he tells PM. "It used to be that only NASA or the Air Force could do such things."'"

FudRucker points out a story from The Guardian about NASA's plans to visit 2000SG344, an asteroid 40 meters wide and weighing roughly 71 million kilograms. The manned mission would take three to six months, and it would make use of the Orion spacecraft, which will be replacing to retiring space shuttle fleet. "A report seen by the Guardian notes that by sending astronauts on a three-month journey to the hurtling asteroid, scientists believe they would learn more about the psychological effects of long-term missions and the risks of working in deep space, and it would allow astronauts to test kits to convert subsurface ice into drinking water, breathable oxygen and even hydrogen to top up rocket fuel. All of which would be invaluable before embarking on a two-year expedition to Mars. As well as giving space officials a taste of more complex missions, samples taken from the rock could help scientists understand more about the birth of the solar system and how best to defend against asteroids that veer into Earth's path."

TangAddict writes "Dr. Alan Weston, who previously invented bungee jumping, led a team of scientists at NASA Ames Research Center to build a $4 million spacecraft in less than two years. The Modular Common Spacecraft Bus is designed to accept payloads of up to 50kg. and can be used for a variety of missions including a rendezvous with asteroids, orbiting Earth or Mars, and landing on the moon. When NASA officials saw the first flight test, they offered Weston and his team $80 million to use their design for the LADEE mission, which will gather dust and atmosphere samples from the moon in 2011."

fyc writes "A new study from NASA's Ames Research Center has suggested that the collision of Earth and a Mars-sized object that created the Moon may also have resulted in the creation of tiny moonlets on Earth's Lagrangian points. 'Once captured, the Trojan satellites likely remained in their orbits for up to 100 million years, Lissauer and co-author John Chambers of the Carnegie Institution of Washington say. Then, gravitational tugs from the planets would have triggered changes in the Earth's orbit, ultimately causing the moons to become unmoored and drift away or crash into the Moon or Earth.'" The longest-lasting of such Trojans could have persisted for a billion years. They would have been a few tens of kilometers in diameter and would have appeared in the sky like bright stars.

Hugh Pickens writes "Nick Bostrom has an interesting interpretation on why the failure of the Search for Extra-Terrestrial Intelligence (SETI) for the past half-century is good news and why the discovery of life on Mars could foretell our doom. Bostrom postulates a 'Great Filter,' which can be thought of as a probability barrier and consists of one or more evolutionary transitions or steps that must be traversed at great odds in order for an Earth-like planet to produce a civilization capable of exploring distant solar systems."