Climb Aboard Explore how the moon was formed Learn about eclipses, the moon's atmosphere, and the effects of its gravitational pull on Earth Meet key Russian and American astronauts and their contributions to lunar exploration See an infographic showing the moon's phases Did You Know? facts and a Guidebook of moon statistics complete your journey. Aligned to Common Core standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.