Our solar system is just one small part of our galaxy, and there are thousands of galaxies besides this one. Readers are introduced to the marvels of galaxies. Formation, sizes, and shapes of galaxies are discussed, including the Milky Way. Galactic movement and how scientists study galaxies are revealed. Color photographs, fast facts, and Words to Know sections increase the reader's learning experience, while a final hands-on activity emphasizes what the reader has learned. This book supports English Language Arts standards and correlates directly with Next Generation Science Standards.