Category Archives: asteriod mining

PopSci: Lasers Could Send A Wafer-Thin Spaceship To A Star

Lasers and photon drives have been a staple of science-fiction for 150 years.

Now finally, laser-driven star probes are in the main-stream of science.

Lasers are now advanced enough to help launch interstellar space probes, researchers say.

Scientists calculate that a gram-sized laser-propelled space probe could reach more than 25 percent of the speed of light and arrive at the nearest star in about 20 years.

The Voyager 1 spacecraft launched in 1977 is finally leaving the solar system after 37 years of flight at a speed of roughly 38,000 miles per hour or less than 0.006 percent the speed of light. This suggests that with conventional propulsion technology, humanity will never reach even the nearest stars, says experimental cosmologist Philip Lubin at the University of California, Santa Barbara.

Lubin and his colleagues suggest that, instead, lasers could accelerate small probes to relativistic — that is, near-light — speeds, reaching nearby stars in a human lifetime. “No other current technology offers a realistic path forward to relativistic flight at the moment,” Lubin says.

The problem with all thrusters that current spacecraft use for propulsion is that the propellant they carry with them and use for thrust has mass. Interstellar spacecraft require a lot of propellant, which makes them heavy, which requires more propellant, making them heavier, and so on.

Photon drives instead involve equipping spacecraft with mirrors and depending on distant light sources for propulsion. Solar sails rely on light from the sun, while laser sails count on powerful lasers.

Lubin acknowledges that photon drives are nothing new — in a letter to Galileo Galilei in 1610, Johannes Kepler wrote, “Given ships or sails adapted to the breezes of heaven, there will be those who will not shrink from even that vast expanse.” What is new, Lubin says, is that recent, poorly appreciated breakthroughs in laser technology suggest they can now accelerate spacecraft to relativistic speeds.

Breakthroughs in laser technology suggest they can now accelerate spacecraft to relativistic speeds.

The advance that Lubin’s approach depends on involves laser arrays. Instead of building one extremely powerful laser — a technologically challenging feat — researchers now can build phased arrays that are made of a large number of relatively modest laser amplifiers that can sync up to act like a single powerful laser. This strategy also eliminates the need for a single giant lens, replacing it with a phased array of smaller optics.

The researchers envision a phased array of currently existing kilowatt-scale ytterbium laser amplifiers that can scale up gradually, adding lasers over time. For instance, a current 1- to 3-kilowatt ytterbium laser amplifier is about the size of a textbook and weighs roughly 5 kilograms.

Eventually, the scientists calculate that a 50- to 70-gigawatt array that is 10 kilometers by 10 kilometers large in Earth orbit could propel a gram-sized wafer-like spacecraft with a 1-meter-wide sail to more than 25 percent of the speed of light after about 10 minutes of illumination, which could reach Mars in 30 minutes and Alpha Centauri in about 20 years. The researchers suggest this array could launch roughly 40,000 relativistic wafer-sized probes per year — each “wafersat” would be a complete miniature spacecraft, carrying cameras, communications, power and other systems.

The same array could propel a 100-ton spacecraft — about the mass of a fully loaded space shuttle, sans rockets — with a 8.5-kilometer-wide sail to about 0.2 percent of the speed of light after about 15 years of illumination. However, it would take about 2,200 years to reach Alpha Centauri at those speeds. Lubin suggests a larger array would make more sense for a human interstellar trip in the distant future, “but I personally do not see this as a priority until many robotic probes have established a need to do so.”

A major problem with this strategy is braking — the researchers currently have no way to slow down these laser-driven spacecraft enough for them to enter into orbit around the distant planets that they are dispatched to. The first missions that accelerate to relativistic speeds may have to simply fly by targets and beam back their data via lasers, Lubin notes.

Lubin notes there are many additional uses for such a laser array other than space exploration. For example, it could deflect asteroids away from Earth, or blast debris out of orbit to prevent it from threatening spacecraft, astronauts and satellites.

They are currently testing to show that small lasers can stop asteroids from spinning.

The researchers stress that they are not proposing to immediately build the largest system. They are currently testing small lasers on asteroid-like rock samples to show that such systems can stop asteroids from spinning, work that could help one day wrangle asteroids for exploration.

If lasers are the only practical route for interstellar travel, Lubin and his colleagues suggest that alien civilization may currently use lasers to help explore the cosmos. They suggest that SETI projects should look for telltale signs of such technology.

Lubin presented his latest work in a talk on January 25 at Harvard.

Lubin however fails to mention how the Military-Industrial-Complex invested billions and billions of dollars to make lasers into a combat grade weapon, which lasers of this type obviously are.

Which begs the question of “Will the government allow space probes of this type to be used?”

And who or whom would be allowed to construct them?

Original article

International Spacecraft To Hit Asteroid in 2022

From Huffington Post:

Aida Mission

Scientists in Europe and the United States are moving forward with plans to intentionally smash a spacecraft into a huge nearby asteroid in 2022 to see inside the space rock.

The ambitious European-led Asteroid Impact and Deflection Assessment mission, or AIDA, is slated to launch in 2019 to send two spacecraft — one built by scientists in the U.S, and the other by the European Space Agency — on a three-year voyage to the asteroid Didymos and its companion. Didymos has no chance of impacting the Earth, which makes it a great target for this kind of mission, scientists involved in the mission said in a presentation Tuesday (March 19) here at the 44th annual Lunar and Planetary Science Conference.

Didymos is actually a binary asteroid system consisting of two separate space rocks bound together by gravity. The main asteroid is enormous, measuring 2,625 feet (800 meters) across. It is orbited by a smaller asteroid  about 490 feet (150 m).

The Didymos asteroid setup is an intriguing target for the AIDA mission because it will give scientists their first close look at a binary space rock system while also yielding new insights into ways to deflect dangerous asteroids that could pose an impact threat to the Earth. [Photos of Potentially Dangerous Asteroids]

“Binary systems are quite common,” said Andy Rivkin, a scientist at Johns Hopkins’ Applied Physics Laboratory in Laurel, Md., working on the U.S. portion of AIDA project. “This will be our first rendezvous with a binary system.”

In 2022, the Didymos asteroids will be about 6.8 million miles (11 million km) from the Earth, during a close approach, which is why AIDA scientists have timed their mission for that year.

Rivkin and his colleagues at Johns Hopkins’ Applied Physics Laboratory are building DART (short for Double Asteroid Redirection Test), one of the two spacecraft making up the tag team AIDA mission. Like its acronym suggests, the DART probe crash directly into the smaller Didymos asteroid while travelling at 14,000 mph (22,530 km/h), creating a crater during an impact that will hopefully sending the space rock slightly off course, Rivkin said.

The European Space Agency is building the second AIDA spacecraft, which is called the Asteroid Impact Monitor (or AIM). AIM will observe the impact from a safe distance, and the probe’s data will be used with other data collected by telescopes on Earth to understand exactly what the impact did to the asteroid.

“AIM is the usual shoebox satellite,” ESA researcher Jens Biele,  who works on the AIM spacecraft, said. “It’s nothing very fancy.”

AIDA scientists hope their mission will push the smaller Didymos asteroid off course by only a few millimeters. The small space rock orbits the larger, primary Didymos asteroid once every 12 hours.

The goal, Rivkin said, is to use the DART impact as a testbed for the most basic method of asteroid deflection: a direct collision with a spacecraft.  If the mission is successful, it could have implications for how space agencies around the world learn how to deflect larger, more threatening asteroid that could pose a threat to Earth, he added.

At the moment, AIDA researchers are not sure of the exact composition of the Didymos asteroids. They could just be a loose conglomeration of rocks travelling together through the solar system, or made of much denser stuff.

But once DART impacts the asteroid, scientists will be able to measure how much the asteroid’s orbit is affected as well as classify its surface composition, Rivkin said. And by studying how debris floats outward from the impact site after the crash, researchers could also better prepare for the conditions astronauts may encounter during future manned missions to asteroids — such as NASA’s project to send astronauts to an asteroid by 2025, he added.

The AIDA mission’s AIM space craft is expected to cost about 150 million euros (about $194 million), while the DART spacecraft is slated to cost about $150 million, mission officials said.

While the DART and AIDA missions are relatively inexpensive ( $150 and $194 million respectively ) private companies such as Planetary Resources and Deep Space Industries don’t just plan on impacting asteroids, they plan on mining the crap out of them.

The question is whether these companies are willing to wait on the science to be obtained by these government probes in order to save them money on research.

Asteroid Deflection Mission AIDA Set To Crash Two Spacecraft Into Space Rock In 2022

Another Asteroid Mining Company Start-Up

From Centauri Dreams:

Deep Space Industries is announcing today that it will be engaged in asteroid prospecting through a fleet of small ‘Firefly’ spacecraft based on cubesat technologies, cutting the costs still further by launching in combination with communications satellites. The idea is to explore the small asteroids that come close to Earth, which exist in large numbers indeed. JPL analysts have concluded that as many as 100,000 Near Earth Objects larger than the Tunguska impactor (some 30 meters wide) are to be found, with roughly 7000 identified so far. So there’s no shortage of targets (see Greg Matloff’s Deflecting Asteroids in IEEE Spectrum for more on this.

‘Smaller, cheaper, faster’ is a one-time NASA mantra that DSI is now resurrecting through its Firefly spacecraft, each of which masses about 25 kilograms and takes advantages of advances in computing and miniaturization. In its initial announcement, company chairman Rick Tumlinson talked about a production line of Fireflies ready for action whenever an NEO came near the Earth. The first launches are slated to begin in 2015. Sample-return missions that are estimated to take between two and four years to complete are to commence the following year, with 25 to 70 kilograms of asteroid material becoming available for study. Absent a fiery plunge through the atmosphere, such samples will have their primordial composition and structure intact.

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The Deep Space Industries announcement is to be streamed live later today. It will reflect the company’s ambitious game plan, one that relies on public involvement and corporate sponsorship to move the ball forward. David Gump is CEO of the new venture:

“The public will participate in FireFly and DragonFly missions via live feeds from Mission Control, online courses in asteroid mining sponsored by corporate marketers, and other innovative ways to open the doors wide. The Google Lunar X Prize, Unilever, and Red Bull each are spending tens of millions of dollars on space sponsorships, so the opportunity to sponsor a FireFly expedition into deep space will be enticing.”

The vision of exploiting space resources to forge a permanent presence there will not be unfamiliar to Centauri Dreams readers. Tumlinson sums up the agenda:

“We will only be visitors in space until we learn how to live off the land there. This is the Deep Space mission – to find, harvest and process the resources of space to help save our civilization and support the expansion of humanity beyond the Earth – and doing so in a step by step manner that leverages off our space legacy to create an amazing and hopeful future for humanity. We are squarely focused on giving new generations the opportunity to change not only this world, but all the worlds of tomorrow.  Sounds like fun, doesn’t it?”

So we have asteroid sample return as part of the mix, but the larger strategy calls for the use of asteroid-derived products to power up space industries. The company talks about using asteroid-derived propellants to supply eventual manned missions to Mars and elsewhere, with Gump likening nearby asteroid resources to the Iron Range of Minnesota, which supplied Detroit’s car industry in the 20th Century. DSI foresees supplying propellant to communication satellites to extend their working lifetime, estimating that each extra month is worth $5 million to $8 million per satellite. The vision extends to harvesting building materials for subsequent technologies like space-based power stations. Like I said, the key word is ‘ambitious.’

“Mining asteroids for rare metals alone isn’t economical, but makes sense if you already are processing them for volatiles and bulk metals for in-space uses,” said Mark Sonter, a member of the DSI Board of Directors. “Turning asteroids into propellant and building materials damages no ecospheres since they are lifeless rocks left over from the formation of the solar system.  Several hundred thousand that cross near Earth are available.”

In the near-term category, the company has a technology it’s calling MicroGravity Foundry that is designed to transform raw asteroid materials into metal parts for space missions. The 3D printer uses lasers to draw patterns in a nickel-charged gas medium, building up parts from the precision placement of nickel deposits. Because it does not require a gravitational field to work, the MicroGravity Foundry could be a tool used by deep space astronauts to create new parts aboard their spacecraft by printing replacements.

The team behind Deep Space Industries has experience in commercial space activities. Tumlinson, a well-known space advocate, was a founding trustee of the X Prize and founder of Orbital Outfitters, a commercial spacesuit company. Gump has done space-related TV work, producing a commercial shot on the International Space Station. He’s also a co-founder of Transformational Space Corporation. Geoffrey Notkin is the star of ‘Meteorite Men,’ a TV series about hunting meteorites. The question will be how successful DSI proves to be in leveraging that background to attract both customers and corporate sponsors.

With such bold objectives, I can only wish Deep Space Industries well. The idea of exploiting inexpensive CubeSat technology and combining it with continuing progress in miniaturizing digital tools is exciting, but the crucial validation will be in those early Firefly missions and the data they return. If DSI can proceed with the heavier sample return missions it now envisions, the competitive world of asteroid prospecting (think Planetary Resources) will have taken another step forward. Can a ‘land rush’ for asteroid resources spark the public’s interest, with all the ramifications that would hold for the future of commercial space? Could it be the beginning of the system-wide infrastructure we’ll have to build before we think of going interstellar?

All of this asteroid mining activity sounds exciting and I can hardly wait for DSI and Planetary Resources to begin their plans. Both are using untried and new technology to develop these new industries and can be extended to such environments as the Moon and Mars.

Mankind will eventually follow. And these new technologies will let us expand into this Universe.

Or the Multiverse.

Deep Space Industries: Mining Near-Earth Asteroids

Wanted: Asteroid Miners

From Kurzweilai.net:

“Do you want to be an Asteroid Miner? Well, here’s your chance!” — an email we just received.

“We’re looking for passionate college students for paid coop positions to help us mine asteroids this spring and summer,” it reads. “If you love space and want to contribute directly to the development of the next generation of space exploration technologies, we want to hear from you (or from anyone you know that you think would be interested). Click here to apply today!

— Chris Lewicki, President & Chief Asteroid Miner, Planetary Resources, Inc.

Planetary Resources’ Asteroid Miners Wanted page reads:

If you are a college student passionate about space and want to be a part of history by helping us develop the technologies that we’ll use to mine asteroids, we want to hear from you today.

This your chance to join our team onsite in Bellevue, Washington for a paid cooperative education position and get hands on experience working with our team.

PRI provides a unique and intimate work environment where you can make an immediate impact on product development and the fulfillment of primary company objectives. Join us in changing the way we explore the solar system!

Click here to apply now and be a part of history in the making!

I hope this is for real, hiring future asteroid miners might be a glamor job now, but it will be a top blue-collar occupation of the 21st century.

At last!

Planetary Resources ‘now hiring asteroid miners’

Dr. Diamandis to announce space project

From Kurtzweil AI:

Dr. Peter Diamandis has announced a live webcast of the company’s announcement at 10:30 a.m. PDT Tuesday April 24 of a “new space venture with the mission to help ensure humanity’s prosperity.”

http://www.kurzweilai.net/asteroid-mining-company-planetary-resources-live-webcast

Somewhere Robert Heinlein smiles knowingly.

Hat tip to the Daily Grail .