and that is doctor sam adler— our century, isn't it? century, isn't it? and that. is doctor sam adler and we will stay in space. moving from harnessing energy to destroying asteroids and spacecraft. nasser is about to fire a spacecraft that huge lump of rock in space just to see if it will tip in another direction. the aim is to develop technology to stop any dangerous asteroid of the future smashing into earth. until now, it's been the stuff of hollywood blockbusters like armageddon. an asteroid heading for earth and a mission to stop it. but science fiction is becoming science fact. for the first time, nasa is sending up a spacecraft to knock an asteroid off course. this one is not a danger to the earth, but the dart mission as a trial of technology for the future. normally when we are talking about a mission to go to space, we are going to explore some new world, but in this case we are literally going to crash a spaceship into an asteroid and change the direction and speed at which it moves through space, and we are doing that to ba