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Introduction

  • Walter Peschka

Abstract

Hydrogen is the ninth most abundant chemical element on Earth. The entire universe consists of more than 90% hydrogen, in the stars in a plasma state and interstellar matter mostly in an atomic state. In the solar system, aside from the sun, interplanetary gas as well as the outer planets (Jupiter, Saturn, Uranus and Neptune) consist primarily of hydrogen.

Keywords

Energy Carrier Liquid Hydrogen Outer Planet Interstellar Matter Rocket Propulsion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Phil. Trans., 1766, p.141, p.145.Google Scholar
  2. 2.
    The Forever Fuel—The Story of Hydrogen“ by P. Hoffmann, Boulder, Colorado, Westview-Press (1981), is recommended to the reader who is interested in getting a quick overview.Google Scholar

Copyright information

© Springer-Verlag/Wien 1992

Authors and Affiliations

  • Walter Peschka
    • 1
  1. 1.Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V.StuttgartBundesrepublik Deutschland

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