Prominence Spectroscope

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Prominence Spectroscope

 

a special spectroscope designed to observe prominences at the edge of the solar disk. The instrument became obsolete by the 1970’s.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Today's amateur is quite lucky, since the old, cumbersome, prominence spectroscope of yesteryear has been superseded by commercial narrowband filters.