Comets and Asteroids 在线电子书 图书标签:
发表于2024-11-25
Comets and Asteroids 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024
These cosmic objects--the leftovers of the formation of our solar system--are the most plentiful bodies in that system. Covered in this fact-filled, up-to-date volume are how asteroids were first discovered, how asteroids and comets formed, their sizes, shapes and orbits, ongoing space flights to these bodies, plans no mine them for their valuable materials, and the very real threat of disaster caused by asteroids and comets impacting the earth.
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Comets and Asteroids 在线电子书 pdf 下载 txt下载 epub 下载 mobi 下载 2024