"Just think of what science and astronomy tell us about the expanse of the solar system and the universe. Our solar system centers on the sun, one of a huge group of stars on the order of 100 billion stars swirling around a huge pinwheel-shaped mass called the Milky Way galaxy, which is about 100,000 light-years across. Astronomers cannot see to the end of the universe, but evidence suggests that the vastness of space contains billions of galaxies stretching for an expanse of 5 billion to 15 billion light-years away from the sun. Compared with such distances, our solar system occupies a very tiny amount of space. The universe is virtually incomprehensible to man."