In later chapters, you will be told how close the visionaries of the past came to guessing what today's explorers would find. Astronomer/painter Lucien Rudaux's masterpieces of Mars dust storms anticipated Viking and Mars rover images by nearly a century. Space artist Ludek Pesek envisioned astronauts setting up camp on the lunar surface in scenes hauntingly similar to photos taken by Apollo astronauts decades later. But the real benefit of this work is in better grasping the nature of our universe -- how big it is, now large it is, and how we fit into it.