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.