Field Tested Systems

RSpec now offers a unique poster of the Periodic Table of the Elements. The Periodic Table of Spectra poster ($6.95) measures 36 by 24 inches and displays the emission spectra of every known element seen in the universe. Its information is based on the NIST Atomic Spectra Database and also includes the names and positions of unstable elements. A laminated version is available for $29.95 plus shipping.'s New Product Showcase is a reader service featuring innovative equipment and software of interest to amateur astronomers. The descriptions are based largely on information supplied by the manufacturers or distributors. Sky & Telescope assumes no responsibility for the accuracy of vendors statements. For further information contact the manufacturer or distributor. Announcements should be sent to [email protected]. Not all announcements will be listed.


You must be logged in to post a comment.