astronomy
Wiley Book of Astronomy:
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astronomy
The science of space beyond Earth's surface and lower atmosphere. In addition to observational astronomy, it includes such branches as astrometry, the measurement of the positions and movements of celestial bodies; astrophysics, the physics of stars, galaxies, and other objects in the universe; celestial mechanics, which specializes in orbit calculation, including the influence of gravity, mass, acceleration, and inertia; and cosmology, which investigates the origins and evolution of the universe.
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Wiley Book of Astronomy
Copyright © 2004 by Wiley-Blackwell. Wiley and the Wiley logo are registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United States and other countries. Used here by license. Read more
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