Have your readers ever seen a comet or a shooting star? You may think they look pretty, but these giant space rocks can cause major destruction. Scientists keep a close watch on comets and asteroids using high-powered telescopes and spacecraft. Get readers ready to learn lots of far-out facts about asteroids and comets.
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语言 英语 ● 格式 PDF ● 网页 48 ● ISBN 9780766053984 ● 出版者 Enslow Publishing, LLC ● 发布时间 2010 ● 下载 3 时 ● 货币 EUR ● ID 8663415 ● 复制保护 Adobe DRM
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