Название: The Milky Way
Автор: Gregory Vogt
Издательство: Lerner
Год: 2010
Страниц 48
ISBN: 0761338756
Формат: PDF
Размер: 11,5 MB
Язык Английский
This lively and informative book offers beginning readers a simple introduction to the Milky Way.
About the Author
Gregory L. Vogt began his professional career as a science teacher. He later joined NASA's education programs, teaching students and teachers about space exploration. He works in outreach programs for the Kennedy Space Center. He is also the principal investigator for an educational grant with the National Space Biomedical Research Institute. Vogt has written more than seventy science books for children.

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Название: Meteors and Comets (Early Bird Astronomy)
Автор: Gregory Vogt
Издательство: Lerner
Год: 2010
Страниц 48
ISBN: 0761338764
Формат: PDF
Размер: 14,2 MB
Язык Английский
Have you ever seen a shooting star? What you really saw was a meteor! A meteor is actually a chunk of metallic or stony matter - called a meteoroid - that enters the earth's atmosphere from outer space. A comet, on the other hand, is a lump of ice and dust that periodically comes into the center of the solar system from somewhere in its outer reaches. Learn more about meteors and comets in this lively and informative book!

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Название: Mars: Prospective Energy and Material Resources
Автор: Viorel Badescu
Издательство: Springer
Год: 2010
Страниц 700
ISBN: 642036287
Формат: PDF
Размер: 19,5 MB
Язык Английский
The manned mission is seen as a first step towards a Mars surface exploration base-station and, later, establishing permanent settlement. The location and use of Mars’s natural resources is vital to enable cost-effective long-duration human exploration and exploitation missions as well as subsequent human colonization. Planet resources include various crust-lodged materials, a low-pressure natural atmosphere, assorted forms of utilizable energy, lower gravity than Earth’s, and ground placement advantages relative to human operability and living standards. Power resources may include us ... Читать дальше »