Breaking through to the stars

Article Abstract:

NASA has established a 'Breakthrough Propulsion Physics' program to pursue new concepts in propulsion that would be needed for interstellar travel. Possible propulsion ideas relate to controlling gravitational forces, using the energy in the space vacuum or traveling faster than light.

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Window to the 21st century

Article Abstract:

Nuclear fusion could provide man with an almost unlimited source of energy and would be an ideal means of spacecraft propulsion. However, research and development efforts are quite a ways from producing a practical fusion engine or reactor.

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Nuclear propulsion: the key to economical access through space

Article Abstract:

Nuclear energy can be used for space vehicles in the same way that it has been used for naval vessels. A brief overview of different nuclear propulsion concepts and how they apply to space flight is presented.

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