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.
لغة الإنجليزية ● شكل PDF ● صفحات 48 ● ISBN 9780766053915 ● الناشر Enslow Publishing, LLC ● نشرت 2010 ● للتحميل 3 مرات ● دقة EUR ● هوية شخصية 8663408 ● حماية النسخ Adobe DRM
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