Space exploration is carried on for political, scientific, military, economic, and psychological reasons. Today, sound, practical reasons exist to continue and extend the use of satellites to improve methods of meteorology, communications and navigation; to name only a few. Scientific discoveries accruing from sound, well-planned space exploration, and their influence on American industries, can only dimly be forseen. Further exploration effort promises to increase and emphasize the role played by the sun in a wide variety of human activities. The satellite Explorer VI and the space probe Pioneer V have extended communications to ranges of 20,000,000 miles; have increased scientific-knowledge of the properties of the exosphere with respect to magnetic fields and energetic charged particles. The space between the planets, far from being empty, is repeatedly being disturbed by great clouds of ionized gas called plasma. These are examples of the unusual and intriguing problems awaiting space exploration. Solution of these and unknown problems can best be achieved by continuous and diligent effort. The part played by the United States in space exploration has been excellent to date. The long range pay-off of such superb effort can scarcely fail to enrich this country, initially, militarily and eventually economically.