IEEE publications: Scanning the issues

The New Astronomies. The exploration of the universe, probably the most evocative of all of man´s enterprises, has had a great technological impetus in this century. Until a few decades ago, man´s knowledge of the universe outside the earth came almost entirely from optical astronomy observations. During the last three decades, astronomical observations at radio wavelengths have created a new branch of science called radio astronomy. The older astronomy in the visible spectrum is now often called optical astronomy to distinguish it from the newer branch.