Radio Astronomy

John .D, Kraus, Ph.D.

Penerbit : McGRAW-HILL BOOK COMPANY, INC.

Tahun : 1966

Radio Astronomy and the Exploration of the Universe Until a few decades ago man’s knowledge of the universe outside the earth came almost entirely from optical-astronomy observations. Beginning millenniums ago with purely visual techniques, astronomy made rapid advances after the invention of the optical telescope in the early seventeenth century and the application of photographic methods in the last century. Ali observations were in the visible part of the electromagnetic spectrum in a band about one octave wide. During the last three decades astronomical observations at radio wavelengths have created a new branch of astronomy called radio astronomy. The older astronomy in the visible spectrum is now often called optical astronomy to distinguish it from the newer branch.

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