Climb Aboard! Explore planets and how they are formed! Meet early astronomers and read about early astronomy! Investigate telescopes, satellites, rovers, and probes! Learn about different planets: terrestrial, gas, ice giants, dwarf, and exoplanets! See an infographic showing the solar system! Did You Know? facts and a Guidebook of planets in our solar system 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.