 | Fly Me to the Moon: An Insider''s Guide to the New Science of Space Travel Subjects: Gravity assist (Astrodynamics) -- Popular works; Celestial mechanics -- Popular works; Chaotic behavior in systems -- Popular works; Many-body problem -- Popular works; Outer space -- Exploration -- Popular works; As astrophysicist and NASA consultant Belbruno explains in this short book, one of the reasons for the exorbitant cost of space flight is the need for huge amounts of fuel. In addition to the cost of the fuel itself, is its weight: "it is very expensive to bring one pound of anything to the Moon-about a quarter million dollars." By solving what are known as three-body equations (the three bodies, for example, being Earth, the Moon and a spacecraft), Belbruno has discovered trajectories between celestial bodies that make use of both chaos theory and gravitational forces, and enable space travel with a fraction of the fuel normally used. The downside is the greater time needed for travel. A trip to the Moon using Belbruno's method, might take three months rather than three days. But this difference poses no trouble for sending supplies and could dramatically lower the cost of building a permanent base on the Moon. Although Belbruno's main ideas are expressed simply enough for the average reader to appreciate, his account of his efforts is disjointed and not as rewarding as the underlying science. Illus. (Mar.) (c) Copyright PWxyz, LLC. All rights reserved Edward Belbruno is President of Innovative Orbital Design, visiting research collaborator in the Department of Astrophysical Sciences at Princeton University, and a consultant on advanced astrodynamics with NASA. He is the author of Capture Dynamics and Chaotic Motions in Celestial Mechanics (Princeton). |
