Название: Asteroids: Prospective Energy and Material Resources
Год: 2013
Автор: Viorel Badescu
Издательство: Springer
ISBN: 3642392431
Формат: PDF
Размер: 45 Mb
Страниц: 300
Язык: Английский
The Earth has limited material and energy resources while these resources in space are virtually unlimited. Further development of humanity will require going beyond our planet and exploring of extraterrestrial resources and sources of unlimited power.
Thus far, all missions to asteroids have been motivated by scientific exploration. However, given recent advancements in various space technologies, mining asteroids for resources is becoming ever more feasible. A significant portion of asteroids value is derived fr ... Читать дальше »

                               

Название: Guidebook to the Constellations: Telescopic Sights, Tales, and Myths"
Год: 2012
Автор: Phil Simpson
Издательство: Springer
ISBN: 1441969403
Формат: PDF
Размер: 38 Mb
Страниц: 435
Язык: Английский
This handbook is a guide to exploring the classical night sky and its wonderful telescopic sights. All 88 officially recognized constellations are presented in natural groups which are related by their origin and location in the sky. Each group is explained by a fascinating story which tells what each constellation represents, how it appears in the sky, and why the other constellations of the group are close by, or related in some other manner. Some of these stories are classical myths which show how and why ... Читать дальше »