The combined length of the DNA in your body is more than twice the diameter of the solar system.
Being a double helical structure DNA takes up quite less space than it would if it were stretched out. The DNA is organized into the long structures of 46 chromosomes. Many coils of these DNA, in fact 3 billion base pairs, are arranged to fit in each cell in as less as 6 microns of space. Stretching the DNA from one cell gives you a length of about 2 meters and stretching all the DNA in your body would be about twice the diameter of the solar system.