I wonder how you steer that thing. As in, earth is a pretty small target from a few light years away. In the case where you want to visit some planet peacefully

I wonder how you steer that thing. As in, earth is a pretty small target from a few light years away. In the case where you want to visit some planet peacefully, you spend the second half of the journey decelerating so you can do the needed corrections easily due to your lower speed, but if you are close to your target at a significant fraction of light speed, it's hard to change your course.