nasa

nasa Mars science curiosity rover - 6977721600
Via Nasa
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The tool is a motorized, wire-bristle brush designed to prepare selected rock surfaces for enhanced inspection by the rover's science instruments. It is built into the turret at the end of the rover's arm. In particular, the Alpha Particle X-ray Spectrometer and the Mars Hand Lens Imager, which share the turret with the brush and the rover's hammering drill, can gain information after dust removal that would not be accessible from a dust-blanketed rock.
space flights starting in 2017
Via Space.com
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Via Space.com:

The private spaceflight companies Boeing and SpaceX are on track to start launching NASA astronauts to the International Space Station by 2017, representatives of both firms said Monday (Jan. 26).

In September 2014, SpaceX and Boeing were awarded contracts under NASA's commercial crew program to help them start flying astronauts on missions to the space station from U.S. soil in the next few years. SpaceX and Boeing are planning to launch a series of tests of their spaceships — capsules called Dragon V2 and the CST-100, respectively — from this year through 2017. The tests will make sure the launch systems are in good shape before the spacecraft make their first official runs to and from the station.

nasa awesome spaceship science - 8271460352
Via Space
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f humanity ever wants to colonize a planet beyond the solar system, it's going to need a really big spaceship. The founding population of an interstellar colony should consist of 20,000 to 40,000 people, said Cameron Smith, an anthropologist at Portland State University in Oregon. Such a large group would possess a great deal of genetic and demographic diversity, giving the settlement the best chance of survival during the long space voyage and beyond, he explained.