Radioastronomy takes over when the most advanced techniques of optical telescopy fail to reveal the outermost regions of the universe. The application of radar during World War II pointed the way toward its usage in peacetime research, and through the efforts of such men as Carl Jansky, B. Y. Mills and M. Ryle, radioastronomy developed. Detailed explanations of the new radiotelescopes designed to seek out ""radio stars"" and divulge precise information about the earth and moon satellites follow a full account of the history of radioastronomy and then lead into a discussion of the varied avenues of research open in a new and supremely exciting science. A wider audience than one might guess - future engineers, astronomers, physicists, meteorologists - may find their interests more specifically channelled after reading this knowledgeable account.