Not to be outdone by their ESA colleagues, NASA is sending a spacecraft to an asteroid to bring a piece of it back. Her name is OSIRIS-REx, and she will be visiting Bennu—great name for an outpost in a sci-fi movie—one of the primordial asteroids that have been orbiting the Sun for millions of years. This is why:
Light degrades the second it hits our atmosphere, making terrestrial astronomy and the search for dim or distant stars tricky. The Gran Telescopio Canarias observatory is the world's largest single-aperture optical telescope, and it's got some ingenious ways to compensate.