For the first time, scientists proposed to run this weird and kinda "sci-fi" experiment to discover if it is possible to save Earth from a possible asteroid impact. The proposal was made at the annual meeting of the American Geophysical Union. According to this proposal, two spaceships will be sent near a binary asteroid system which will approach Earth in 2022. One of this spaceships will ram the asteroid and the other will be watching. Scientists want to see if the asteroid will be deflected and how much. Obviously, Michael Bay's idea to land on the Asteroid and explode it from the inside is not quite realistic.
PHOTO CREDIT: NASA/JPL/JHUAPL
This color image of Eros was acquired by NEAR's multispectral imager on February 12, 2000, at a range of 1100 miles (1800 kilometers). It is part of the final approach imaging sequence prior to orbit insertion and is intended to map the color properties of Eros across all of the illuminated surface.
@cheerio if the spaceship reaches high velocity, it may deflect by one degree or by less than a degree, maybe a few seconds... That will be probably enough to avoid collision - as always, all scenarios like this can might work only if the asteroid is detected when it is still far far away