Since the discovery of the Josephson effect, astronomers have been intrigued with the possibility of using junctions of two superconductors connected by a weak link to detect millimeter and submillimeter radiation from astronomical objects. Now Bruce T. Ulrich of the University of Texas has reported (at the American Astronomical Society meeting in New York last December) the first astronomical observations with a Josephson junction; he has observed the sun, moon and Venus. His group and other groups (at the University of California at Berkeley and at the State University of New York at Stony Brook) are testing several different ways of using Josephson‐type junctions in hopes of improving sensitivity.

This content is only available via PDF.
You do not currently have access to this content.