This is an engaging book ready to take you on an afternoon voyage through the cosmos. You help with experiments and learn some of the processes that go into making up scientific hypotheses on relativity, the speed of light and other light matters. Some humor is interjected to soften the dryness of the subject matter. Delightful illustrations will welcome you along for the fun. Come along for the ride and begin your adventure into light science. Find out why some ideas from days past are no longer considered correct and how that changes the way we will all look at the science of the stars in the future.