Smithsonian Kids: A is for Astronaut:

Inside this board book, little space explorers will learn out-of-this-world words for each letter of the alphabet paired with colorful illustrations on each page. From astronaut to zero gravity, this simple introduction to outer space and the ABCs is sure to delight babies and their parents! Author Jennifer Levasseur serves as the as the responsible curator for the National Air and Space Museum's astronaut cameras and chronographs, as well as the Space Shuttle and International Space Station programs.