Scientists believe aerogel sheets could transform the cold, arid surface of Mars into land fit for farming. The Guardian reports: The "aerogel" sheets work by mimicking Earth's greenhouse effect, where energy from the sun is trapped on the planet by carbon dioxide and other gases. Spread out in the right places on Mars, the sheets would warm the ground and melt enough subsurface ice to keep plants alive. Should humans ever decide to spread beyond Earth, as the late Stephen Hawking declared we must, then growing food on alien worlds will be a skill that has to be mastered. But on Mars the conditions are hardly conducive. The planet is frigid and dry and bombarded by radiation, the soil contains potentially toxic chemicals and the wispy atmosphere is low on nitrogen.

The aerogel sheets do not solve all of the problems but they could help future spacefarers create fertile oases on desolate planets where plants and other photosynthesizing organisms can take root. Because life would only grow beneath the sheets, the risk of contaminating the rest of Mars with foreign lifeforms would be minimal. The aerogel used to make the sheets is composed 97% of air, with the rest made up of a light silica network. The researchers, including scientists at Nasa and the University of Edinburgh, showed that 2cm- to 3cm-thick sheets of silica aerogel blocked harmful UV rays, allowed visible light through for photosynthesis and trapped enough heat to melt frozen water locked in Martian soil. The sheets could be laid directly on the ground to grow algae and aquatic plants, or suspended to provide room for land plants to grow beneath them. The researchers published their findings in the journal Nature Astronomy.

We're reviving an old Slashdot tradition -- the review. Whenever there's something especially geeky -- or relevant to our present moment -- we'll share some thoughts. And I'd like to start with Jonathan Coulton's amazing 2017 album Solid State, and its trippy accompanying graphic novel adaptation by Matt Fraction. I even tracked down Jonathan Coulton on Friday for his thoughts on how it applies to our current moment in internet time...

"When I started work on Solid State, the only thing I could really think of that I wanted to say was something like, 'The internet sucks now'," Coulton said in 2017 in an epilogue to the graphic novel. "It's a little off-brand for me, so it was a scary place to start..."

So what does he think today? And what did we think of his album...?

"Starshot wants to build the world's most powerful laser and aim it at the closest star. What could go wrong?"

An anonymous reader quotes MIT's Technology Review: In 2015, Philip Lubin, a cosmologist from the University of California, Santa Barbara, took the stage at the 100-Year Starship Symposium in Santa Clara. He outlined his plan to build a laser so powerful that it could accelerate tiny spacecraft to 20% of the speed of light, getting them to Alpha Centauri in just 20 years. We could become interstellar explorers within a single generation. It was quite the hook.

Because Lubin is an excellent public speaker, and because the underlying technologies already existed, and because the science was sound, he was mobbed after the talk. He also met Pete Worden, a former research director of NASA's Ames Research Center, for the first time. Worden had recently taken over as head of the Breakthrough Initiatives, a nonprofit program funded by Russian technology billionaire Yuri Milner. Six months later, Lubin's project had $100 million in funding from Breakthrough and the endorsement of Stephen Hawking, who called it the "next great leap into the cosmos."

Starshot is straightforward, at least in theory. First, build an enormous array of moderately powerful lasers. Yoke them together—what's called "phase lock"—to create a single beam with up to 100 gigawatts of power. Direct the beam onto highly reflective light sails attached to spacecraft weighing less than a gram and already in orbit. Turn the beam on for a few minutes, and the photon pressure blasts the spacecraft to relativistic speeds.

Not only could such a technology be used to send sensors to another star system; it could dispatch larger craft to Earth's neighboring planets and moons. Imagine a package to Mars in a few days, or a crewed mission to Mars in a month. Starshot effectively shrinks the solar system, and ultimately the galaxy.

It's fantastic. And also a dream. Or a sales pitch. Or a long-term, far-out project that can't be sustained long enough for the nonexistent technologies it requires to be built.

Scientists from the University Hospital of Dresden Technical University in Germany have successfully bio-printed skin and bone samples upside down to help determine if the method could be used in a low-gravity environment. CNET reports: The skin sample was printed using human blood plasma as a "bio ink." The researchers added plant and algae-based materials to increase the viscosity so it wouldn't just fly everywhere in low gravity. "Producing the bone sample involved printing human stem cells with a similar bio-ink composition, with the addition of a calcium phosphate bone cement as a structure-supporting material, which is subsequently absorbed during the growth phase," said Nieves Cubo, a bioprinting specialist at the university. These samples are just the first steps for the ESA's ambitious 3D bio-printing project, which is investigating what it would take to equip astronauts with medical and surgical facilities to help them survive and treat injuries on long spaceflights and on Mars.

Mold spores commonly found aboard the International Space Station (ISS) turn out to be radiation resistant enough to survive 200 times the X-ray dose needed to kill a human being. Based on experiments by a team of researchers led by Marta Cortesao, a microbiologist at the German Aerospace Center (DLR) in Cologne, the new study indicates that sterilizing interplanetary spacecraft may be much more difficult than previously thought. New Atlas reports: The researchers exposed samples of Aspergillus and Pennicillium spores to X-rays, heavy ions, and high-frequency ultraviolet light of the kinds and intensities found in space. Such radiation damages DNA and breaks down cell structures, but the spores survived X-rays up to 1,000 gray, heavy ions at 500 gray, and UV rays up to 3,000 joules per meter squared. Gray is a measurement of radiation exposure based on the absorption of one joule of radiation energy per kilogram of matter. To place the results into perspective, five gray will kill a person and 0.7 gray is how much radiation the crew of a Mars mission would receive on a 180-day mission.

Since mold spores can already survive heat, cold, chemicals, and drying out, being able to take on radiation as well poses new challenges. It means that not only will manned missions have to put a lot of effort into keeping the ship clean and healthy, it also means that unmanned planetary missions, which must be free of terrestrial organisms to prevent contaminating other worlds, will be harder to sterilize. But according to Cortesao there is a positive side to this resiliency. Since fungal spores are hard to kill, they'd be easier to carry along and grow under controlled conditions in space, so they can be used as raw materials or act as biological factories.

An anonymous reader quotes a report from The Guardian: All-female astronaut crews could reproduce in space without the help of accompanying men, new research suggests. The study found that frozen samples of sperm exposed to microgravity retained similar characteristics to sperm samples kept on the ground, raising hopes that a sperm bank could one day be set up in space to help populate new worlds. This could prove interesting for female astronauts, amid reports that future missions to Mars may involve women-only space crews. Findings from the small preliminary study, involving sperm from 10 healthy donors, suggest that "the possibility of creating a human sperm bank outside of Earth" exists, according to the researchers.

One group of sperm samples used in the study had been exposed to microgravity with the help of a small aerobatic aircraft. The samples then underwent fertility screenings and were analyzed for concentration, motility and DNA fragmentation. No significant differences were detected between samples that had been given a ride and those that had stayed on the ground.

The Curiosity mission's scientists picked up the signal this week, and are seeking additional readings from the red planet. From a report: Mars, it appears, is belching a large amount of a gas that could be a sign of microbes living on the planet today. [Editor's note: the link may be paywalled; alternative source.] In a measurement taken on last Wednesday, NASA's Curiosity rover discovered startlingly high amounts of methane in the Martian air, a gas that on Earth is usually produced by living things. The data arrived back on Earth on last Thursday, and by Friday in the week, scientists working on the mission were excitedly discussing the news, which has not yet been announced by NASA. "Given this surprising result, we've reorganized the weekend to run a follow-up experiment," Ashwin R. Vasavada, the project scientist for the mission, wrote to the science team in an email that was obtained by The Times.

The mission's controllers on Earth sent new instructions to the rover on Friday to follow up on the readings, bumping previously planned science work. The results of these observations are expected back on the ground later today. People have long been fascinated by the possibility of aliens on Mars. But NASA's Viking landers in the 1970s photographed a desolate landscape. Two decades later, planetary scientists thought Mars might have been warmer, wetter and more habitable in its youth some 4 billion years ago. Now, they are entertaining the notion that if life ever did arise on Mars, its microbial descendants could have migrated underground and persisted.

An anonymous reader quotes a report from ZDNet: A report published this week by the NASA Office of Inspector General reveals that in April 2018 hackers breached the agency's network and stole approximately 500 MB of data related to Mars missions. The point of entry was a Raspberry Pi device that was connected to the IT network of the NASA Jet Propulsion Laboratory (JPL) without authorization or going through the proper security review. NASA described the hackers as an "advanced persistent threat," a term generally used for nation-state hacking groups.

An anonymous reader writes: Americans are less interested in NASA sending humans to the moon or Mars than they are in the U.S. space agency focusing on potential asteroid impacts and using robots for space exploration. That's according to a poll by The Associated Press and the NORC Center for Public Affairs Research released Thursday, one month before the 50th anniversary of the first walk on the moon. Two-thirds of respondents said monitoring asteroids, comets and "other events in space that could impact Earth" was "very or extremely important." According to NASA, which watches for objects falling from space, about once a year an "automobile-sized asteroid hits Earth's atmosphere," but it usually burns up before it hits the surface. And the instances of larger objects actually making it past Earth's atmosphere and causing any damage happen thousands of years apart, NASA says. The poll also found that Americans want NASA to focus on conducting space research to expand knowledge of the Earth, solar system and universe and they want "robots without astronauts" to do it. If you want to build capabilities for dealing with dangerous asteroids, asteroid mining should be the technology we prioritize, because there's a lot of crossover there.

Scientists have discovered that some clouds on Mars are created from the debris of meteors that burn up in the planet's atmosphere. "This 'meteoric smoke,' described in a paper published Monday in Nature Geoscience, stimulates cloud formation at altitudes between 30 and 60 kilometers," reports Motherboard. From the report: "Until now, meteoric smoke has been neglected in general circulation model studies of the formation of Martian water ice clouds," said the study's authors, who were led by Victoria Hartwick, a graduate student at the University of Colorado Boulder. "We conclude that Mars atmospheric simulations that neglect meteoric smoke do not reproduce the observed spatial distribution of water ice clouds." These meteoric smoke clouds are distinct from low-altitude clouds that form when dust particles are kicked up from the Martian surface by winds, and also differ from high altitude clouds that nucleate around carbon dioxide particles, the team said.

The team used data from NASA's Mars Atmosphere and Volatile Evolution (MAVEN) orbiter to show that about three or four tons of alien dust slams into Mars' atmosphere every sol, which is the Martian version of a day. Only a fraction of this interplanetary material sprinkles down to lower altitudes, but that is more than enough to encourage cloud formation. The new research not only explains how these enigmatic clouds form on Mars, it also suggests that meteors may play a larger role in the Martian climate than previously assumed. For instance, meteoric smoke could help explain cloud formation during Mars' early years, when the planet was warmer, wetter, and possibly conducive to life.

Long-time Slashdot reader fahrbot-bot brings us news about the southern hemisphere of Mars: The University of Arizona HiRISE (High Resolution Imaging Science Experiment) has posted a photo of curious chevron shapes in southeast Hellas Planitia that are the result of "a complex story of dunes, lava, and wind."

"Enterprising viewers will make the discovery that these features look conspicuously like a famous logo..."
RockDoctor (Slashdot reader #15,477) adds that "For those wanting to try to find it on a Mars map, it's at Latitude (centered) -49.325Â Longitude (East) 85.331Â."

An anonymous reader shares a report: On Saturday, June 22, SpaceX plans to launch its Falcon Heavy Rocket out of the Kennedy Space Center in Cape Canaveral, Florida. The reusable craft is coming off two successful flights; its maiden launch in early 2018 and a satellite delivery trip in April 2019. For its third adventure, the Falcon Heavy will ferry a trove of precious cargo up into space. Around two dozen satellites are going along for the ride this time. But the rocket's most interesting passenger has to be the Orbital Test Bed satellite. Its main payload is an experimental, toaster-sized gizmo called the Deep Space Atomic Clock (DSAC). If the thing works properly, future missions to Mars, Jupiter and beyond could become a whole lot easier -- and less expensive.

The autonomous rotorcraft NASA is planning to integrate with the agency's Mars 2020 rover mission has successfully passed another round of important tests. The Verge reports: Earlier this year, JPL conducted tests of the helicopter in "a simulated Martian environment" that put the helicopter through temperatures as low as minus 130 degrees Fahrenheit and flew it in a vacuum chamber that simulated Martian air -- it was also attached to a "motorized lanyard" to help simulate Martian gravity. Some of the testing was to ensure that the Mars Helicopter could survive the conditions it would experience during an actual rocket launch. The Mars Helicopter is now back at JPL, where it will has already had a new solar panel installed. NASA says that it isn't putting any science instruments on the helicopter beyond a camera, but that instead it's a "technology demonstrator" to prove that it's possible to remotely fly a Martian drone from Earth.

Boston Dynamics is about to launch its first ever commercial product -- a quadrupedal robot named Spot. The Verge reports: Spot is currently being tested in a number of "proof-of-concept" environments, Boston Dynamics' CEO Marc Raibert told The Verge, including package delivery and surveying work. And although there's no firm launch date for the commercial version of Spot, it should be available within months, said Raibert, and certainly before the end of the year. "We're just doing some final tweaks to the design," said the CEO. "We've been testing them relentlessly."

Rather than selling the robot as a single-use tool, it's positioning it as a "mobility platform" that can be customized by users to complete a range of tasks. A Spot robot mounted with 3D cameras can map environments like construction sites, identifying hazards and work progress. When equipped with a robot arm, it has even greater flexibility, able to open doors and manipulate objects. At Re:MARS, a Spot with a robot arm used it to pick up items, including a cuddly toy that was then offered to a flesh-and-blood police dog. The dog was unimpressed with the robot, but happy, at least, to receive the toy. Raibert says it's this "athletic intelligence" that Boston Dynamics will be selling through its robots. Think of it like Amazon's AWS business, but instead of offering computing power on tap, its robotic mobility. How much will Spot cost? Raibert only said that the commercial version will be "much less expensive than prototypes [and] we think they'll be less expensive than other peoples' quadrupeds."

He did, however, reveal that the company had already found some paying customers, including construction companies in Japan who are testing Spot as a way to oversee the progress of work on sites.

Amazon's drone ambitions took another step forward on Wednesday as the tech giant revealed its latest delivery drone design. From a report: At Amazon's re:MARS Conference, Amazon executive Jeff Wilke showed off a fully-electric drone that can fly up to 15 miles and deliver packages under five pounds in less than 30 minutes. The new drone will start making deliveries to customers "within months," Wilke said, but did not provide further details. The new hexagonal design looks quite different than the experimental drones that made Amazon Prime Air's first aerial drop-offs in England in 2016 and in California in 2017. "Our newest drone design includes advances in efficiency, stability and, most importantly, in safety," Wilke wrote in a blog post. "It is also unique, and it advances the state of the art. How so? First, it's a hybrid design. It can do vertical takeoffs and landings -- like a helicopter. And it's efficient and aerodynamic -- like an airplane. It also easily transitions between these two modes -- from vertical-mode to airplane mode, and back to vertical mode." Amazon added that these drones are going to use "stereo vision in parallel with sophisticated AI algorithms" to detect people and animals from above. "A customer's yard may have clotheslines, telephone wires, or electrical wires. Wire detection is one of the hardest challenges for low-altitude flights. Through the use of computer-vision techniques we've invented, our drones can recognize and avoid wires as they descend into, and ascend out of, a customer's yard," the company added in a statement.

NASA will etch your name onto a silicon chip that will be carried to Mars by a rover in 2020:

An anonymous reader quotes the Verge: The rover's primary mission is to get us closer to answering that fundamental question: did Mars ever host alien life? The robot is equipped with tools and instruments that will help scientists figure out if the planet may have hosted life in the past. On top of that, the rover will also be drilling and collecting samples of Martian dirt. It'll then leave those samples on the ground, where they could potentially be picked up someday by another spacecraft and brought back to Earth. And while the Mars 2020 rover is doing all of this, your name could be along for the ride.

If you send in your name sometime before September 30th, NASA engineers at the Jet Propulsion Laboratory will etch it onto a silicon chip with an electron beam, and then the rover will carry it on its journey. The names are going to be pretty teeny, though -- about one-thousandth the width of a human hair. That's small enough so that more than a million names can be included on a single chip as big as a dime -- but big enough for any Martian microbes to read (only kidding... Martians can't read).

A top NASA executive hired in April to guide strategy for returning astronauts to the moon by 2024 has resigned, the space agency said on Thursday, the culmination of internal strife and dwindling congressional support for the lunar initiative. From a report: Mark Sirangelo, named six weeks ago as special assistant to NASA Administrator Jim Bridenstine, left the agency as NASA abandoned a reorganization plan due to a chilly reception on Capitol Hill, Bridenstine said in a statement. His departure came after lawmakers rejected NASA's proposal to create a separate directorate within the space agency to oversee future lunar missions and ultimately develop human exploration of Mars. [...] Last week, the Trump administration asked Congress to increase NASA's spending next year by $1.6 billion as a "down payment" on the accelerated goal of landing Americans back on the moon by 2024, more than half a century after the end of the U.S. Apollo lunar program.

SpaceX is planning to launch test flights of its Starhopper test vehicle to a height of up to 16,400 feet. "The short tests, which will take place out of SpaceX's launch site in Boca Chica, Texas, will send the rocket to just under 1,640 feet (500 meters) high for its low-altitude flights and up to 16,400 feet (5,000 meters) high for its high-altitude flights," reports The Verge, citing a modified application filed with the FCC. The heights match those that the company indicated in a similar filing last year. From the report: The Starhopper is a very basic version of Starship, the massive passenger rocket that SpaceX wants to build to send people to the Moon and Mars. In order to prepare for the first Starship's flight to space, SpaceX has been tinkering with the test Starhopper in Boca Chica. The vehicle boasts a similar structure to the final rocket, though it's slightly smaller in size. Starhopper's most important task is to test out the new, powerful Raptor engines that SpaceX has developed for the future deep-space rocket.

SpaceX fired up a Raptor engine on the bottom of the Starhopper for the first time in April. It only lifted a few inches since the vehicle was tethered to the ground. But now, SpaceX plans to perform what are known as "hop" tests with the vehicle (hence the nickname Starhopper), which will send the rocket to a low altitude above the Earth. The company will then attempt to touch the Starhopper back down on the ground with the vehicle's three landing legs. The idea is to test out the landing capabilities the rocket's going to use to touch down on Earth and other worlds. SpaceX performed similar tests with a vehicle known as Grasshopper back in 2012 and 2013 to try out the landing technique its Falcon 9 rockets now use.

Slashdot reader schwit1 shares a report from USA Today discussing a new book from famed astronautical engineer Bob Zubrin, who makes the case for why we should go to space -- not only for the knowledge and challenge, but to "ensure our survival and protect our freedom." Among the reasons why he thinks we need to spread out through the Solar System (and perhaps beyond): For the Knowledge: We know little about the universe, despite our conceit that we have things figured out. The farther we go, the more new things we will encounter, and the more our knowledge and understanding will expand.

For the Challenge: Zubrin looks at the way the Age of Exploration rejuvenated a stagnant Europe at the beginning of the 16th Century, and the way the American frontier imparted a dynamism to American culture that, since that frontier's closing, seems to have faded. New frontiers, with their array of opportunities and challenges, make an excellent antidote to stagnation, aristocracy and zero-sum thinking.

For Our Survival: Last week saw reports that an 1100-foot asteroid will pass within 13,000 miles of earth -- that's closer than many satellites -- in less than a decade. (The famous Barringer Meteor Crater in Arizona was made by an asteroid a fraction that size, and exploded with the force of more than 100 Nagasaki-sized atomic bombs). These asteroid encounters turn out to be much more common than once thought, and the likelihood of a strike is high enough that authorities are rehearsing a response. With a strong space economy, deflecting dangerous asteroids will be easy. Without it, we're just sitting ducks in a cosmic shooting gallery.

For Our Freedom: Earth is crowded, and governments (and corporations like Facebook) are getting ever more intrusive as privacy grows every more scarce. The danger of a global tyranny backed by modern technology of surveillance and control is growing. Getting a sizable chunk of humanity off the planet and far enough away -- the Moon, Mars, even the asteroid belt -- makes it less likely that such a tyranny could become all-encompassing.

There are earthquakes and moonquakes, and now a NASA spacecraft has detected what's believed to be a "marsquake" on the Red Planet. From a report: The spacecraft picked up the faint trembling of Mars's surface on 6 April, 128 days after landing on the planet last November. The quake is the first to be detected on a planetary body other than Earth or Moon. The shaking was relatively weak, the French space agency CNES said on 23 April. The seismic energy it produced was similar to that of the moonquakes that Apollo astronauts measured in the late 1960s and early 1970s. "We thought Mars was probably going to be somewhere between Earth and the Moon" in terms of seismic activity, says Renee Weber, a planetary scientist at NASA's Marshall Space Flight Center in Huntsville, Alabama. "It's still very early in the mission, but it's looking a bit more Moon-like than Earth-like," she says. It's not yet clear whether the shaking originated within Mars or was caused by a meteorite crashing into the planet's surface.