A faint star which is 50,000 times less luminous than the sun (and which may be the sun's nearest neighbor in interstellar space) was reported recently by astronomers of the University of Chicago's Yerkes Observatory in Wisconsin (TIME, May 23). Last week Dr. Fritz Zwicky of California Institute of Technology announced discovery of a star at the other extreme of cosmic brightness—400,000,000 times as bright as the sun.
This brightness was manifested at the peak of a stellar explosion. The star has now subsided to 1,000,000 times the sun's luminosity.
Dr. Zwicky has been...
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