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Far-Out Guide to the Icy Dwarf Planets
Mary Kay Carson
出版Enslow Publishing, LLC, 2010-07-01
主題Juvenile Nonfiction / Science & Nature / AstronomyJuvenile Nonfiction / Technology / Aeronautics, Astronautics & Space Science
ISBN07660539119780766053915
URLhttp://books.google.com.hk/books?id=HptmDwAAQBAJ&hl=&source=gbs_api
EBookSAMPLE
註釋Our solar system used to have nine planets, but recently, scientists ruled that Pluto was actually a "dwarf planet." So what exactly is a dwarf planet, how many of them are there, and how do scientists study and classify them? All the facts readers need, and lots more, are included in this book, featuring a center spread with fast facts.