I was just wondering, planets are moing through space in a certain speed, but asteroids move even faster since it`s gotten lose from planets by impacts? If so, couldn`t one just look at asteroids in space to find out if there`s life somewhere, I mean, just look at how it`s affected by heat over it`s history, it should look a little like rocks from our planets shouldn`t it, couldn`t we just find rocks in space that looks a little similar and find the direction it`s coming from?