What Are Planets? (¿Qué Son Los Planetas?) Bilingual Eng/Spa - Paperback

by David Armentrout (Author), Pablo de la Vega (Translator)

True planets, dwarf planets, and exoplanets--what's the difference? Learn the three rules scientists use to decide what makes something a planet. Discover how the search continues outside our solar system to find a planet like Earth. Notes to caregivers and teachers provide question prompts to assist reader comprehension.