NASA seems to be exploring ways by which they can widen up their circle of search. They have been working on a plan, where they want an asteroid to be moved into the orbit around the Moon.

After doing the same, NASA will visit the asteroid and get back samples on Earth. NASA has already started working on its plan.

It has narrowed down its hunt for an asteroid. They have two to three in consideration, but further research will be able to come up with a valid candidate.

"We have two to three which we will characterise in the next year and if all goes well ... those will be valid candidates that could be certified targets", said Paul Chodas, senior scientist at Near-Earth Object Program Office, NASA.

Once the asteroid is finalized then it will be captured and will be moved into the Moon's orbit. The spacecraft that will be used to reach asteroid is already decided.

The Orion multi-purpose vehicle and a new deep space rocket launcher will be used. Main aim of the project is to step ahead and explore the opportunities in low-Earth orbit. US president Barack Obama has appreciated the project by terming it to be a vital step.