文档介绍：ASTRONOMY AND
ASTROPHYSICS LIBRARY
Series Editors: I. Appenzeller, Heidelberg, Germany
G. B¨orner, Garching, Germany
A. Burkert, M¨unchen,Germany
. Dopita, Canberra, Australia
A. Eckart, Köln, Germany
T. Encrenaz, Meudon, France
M. Harwit, Washington, DC, USA
R. Kippenhahn, G¨ottingen,Germany
J. Lequeux, Paris, France
A. Maeder, Sauverny, Switzerland
V. Trimble, College Park, MD, and Irvine, CA, USA
Gerhard Beutler
Methods of
Celestial Mechanics
Volume I:
Physical, Mathematical,
and Numerical Principles
In Cooperation with
Prof. Leos Mervart and Dr. Andreas Verdun
With 99 Figures Including 11 Color Figures,
32 Tables and a CD-ROM
123
Professor Dr. Gerhard Beutler
Universit¨atBern
Astronomisches Institut
Sidlerstrasse 5
3012 Bern, Switzerland
e-mail: gerhard.******@
Cover picture: This mosaic shows images of Earth and the moon acquired by the multispectral imager on the Near
Earth Asteroid Rendezvous Spacecraft (NEAR) on January 23, 1998, 19 hours after the spacecraft swung by Earth
on its way to the asteroid 433 Eros. The images of both were taken from a range of 250,000 miles (400,000 km),
approximately the same as the distance between the two bodies. This unique perspective, never seen before, shows
both our and its moon at the relative size that each appears when viewed from the other. Also, both Earth and
the Moon are viewed from above their south poles, a perspective not attainable from either body because the moon
orbits high above Earth’s equator. In the Earth image, the south pole is at the center and the continent of Antarctica is
surrounded by sea ice and storm fronts. The image mosaic is contructed from blue, green, and infrared filters. These
colors highlight differences between rock types, water, and vegetation. On Earth, the red area at the upper right side
is desert and vegetation in Australia. Snow, ice, and clouds appear as sublty different shades of white and light blue.
The moon’s