NASA's first asteroid-sampling mission
On September NASA OSIRIS-REx spacecraft will be launched from Cape Canaveral Air Force Station; the program is meant to to map the asteroid Bennu and study the composition and measure the "Yarkovsky Effect" on its orbit.
According to space.com, the reason Bennu was chosen was because it passed three major check points: "Bennu's size, primitive and carbon-rich composition and orbit make it one of the most fascinating and accessible asteroids, and that is why it was ultimately chosen as the target asteroid for the OSIRIS-REx mission."
The satellite will arrive at Bennu in August 2018; its main mission is to grab at least 2 ounces of asteroid material two years later and return this sample to Earth in September 2023. The project has cost $800 million but plays a very important role in explaining the creation and history of the universe.
To find out more about Bennu, go to http://www.space.com/33987-why-nasa-picked-asteroid-bennu-osiris-rex-mission.html
information from the following article was found and researched from www.space.com