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New Space Mining Tech Could Be Game-Changer for Interstellar Travel
by Staff Writers
Moscow (Sputnik) Sep 22, 2015

APIS (Asteroid Provided In-Situ Supplies): 100MT Of Water from a Single Falcon 9. For a larger version of this image please go here.

NASA researchers have come up with a seemingly simple - and extremely potent - idea: "optical mining," through which the water contained within millions of asteroids across the universe could be used as a source of propellant for spaceships, making space voyages cheaper than ever.

The concept, known as the Asteroid Provided In-Situ Supplies plan (Apis), was detailed by NASA researchers at the latest American Institute of Aeronautics and Astronautics' (AIAA) meeting earlier this month, reported.

The ultimate goal of the project is to turn volatiles - water in particular, of which all asteroids are partly comprised - into an affordable propellant for space vessels.

But the biggest challenge facing researchers is how to extract those volatiles out of rocky carbonaceous chondrite asteroid surfaces.

"Optical mining" could be the solution, as it would make possible the extraction of water from space rocks without the use of "complex or impractical robotics."

Joel Sercel, an Apis investigator, told that highly concentrated optical energy - or, more simply, sunlight focused and concentrated by two sets of mirrors - can be used as a laser to essentially bake water out of asteroids, which will then be collected by containment bags right there in space.

"It actually digs holes and tunnels into the rock," Sercel said. "The heat goes in, is absorbed in thin layers and drives out the volatiles in tiny, explosive like pops that eject material in a controllable way."

To check whether this concept actually works, Sercel along with his team, supported by NASA and a small business contract, will carry out experiments at the White Sands Missile Range in New Mexico, a facility once used for conducting nuclear weapon tests.

A cantaloupe-sized asteroid model will be heated to extremely high temperatures by reflected and concentrated sunlight. If the strategy works, the project will move into its next phase.

Sercel pointed out that over 120 tons of water, collected over several months using this technique, could be stored, and transported to lunar orbit using some as fuel for its onboard solar-thermal propulsion system. Once there, it could be used to fuel a variety of ventures, including exploration beyond low-Earth orbit.

Angel Abbud-Madrid, director of the Center for Space Resources at the Colorado School of Mines in Golden, Colorado, told this strategy could mean a real breakthrough in space exploration, following years of ineffective attempts to apply terrestrial mining techniques in space.

"We are excited to finally participate in the development of what we consider the most feasible and effective technique to recover valuable volatile elements, such as space propellants, from asteroids," he said.

Source: Sputnik News

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