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HindustanTimes Sat,23 Aug 2014

Life and Universe

Spacecraft circling Earth could help intercept incoming asteroids, meteors
ANI
February 16, 2013
First Published: 15:18 IST(16/2/2013)
Last Updated: 19:09 IST(18/2/2013)
This undated artist's concept released by NASA and UCLA shows the Dawn spacecraft with Ceres and Vesta.
Deep Space Industries have proposed for the creation of a sentry line of spacecraft circling the Earth to intercept and evaluate incoming threats, after Friday’s meteor impact in Russia and the near miss by football field-sized asteroid 2012 DA14.
 
“The hundreds of people injured in northern Russia show it’s time to take action and no longer be passive about these threats,” Rick Tumlinson, chairman of Deep Space Industries said.
 
Several sentry lines encircling Earth with small spacecraft will be able to dart after intruders to get close-in photos and data as they pass.
 
Over time additional spacecraft able to grab samples for analysis on Earth would join the sentry lines.
 
Not all asteroids are the same, and to be ready to deflect one that’s on a dangerous trajectory the world needs to know more about their structure and composition.
 
Many may be solid but all photos so far have shown gravel and rock piles. A defense plan assuming the wrong type could make matters worse.
 
“Placing ten of our small FireFly spacecraft into position to intercept close encounters would take four years and less than 100 million dollars,” David Gump, CEO of Deep Space Industries said.
 
“This will help the world develop the understanding needed to block later threats,” he said.
 
There are estimated to be more than 10,000 near Earth asteroids that could destroy a major city and a hundred that would end civilization.
 
Near Earth asteroids are confirmed at a rate of more than 900 per year, but as yet little is known about their composition and structure.
 
Deep Space Industries is preparing the FireFly series to begin prospecting in 2015 for asteroids that are very small, five to seven meters in diameter. The same FireFly prospecting design would be used in the sentry line of asteroid interceptors.
 
Then in 2020, Deep Space will bring one of these tiny rocks back to a parking orbit near Earth to be harvested for its water, rocket fuel, and metals for in-space customers such as communications satellites that have run out of gas.
 
The larger harvesting spacecraft might be the basis for interceptors that could nudge larger threats into trajectories that miss Earth.
 
In the coming months Deep Space Industries will be offering plans to develop a coordinated low-cost commercial solution to setting up humanity’s first line of defense against asteroid threats.

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