Synopsis
At a convention of astronomers, it is proposed that a great new telescope be constructed. It would use a "mercury mirror" along with an "ether beam" to destroy matter which might inhibit the transmission of light through the atmosphere. While exploring with the telescope after its construction, the scientists discover a nearly identical setup on Mars.<br> Available on page 510, <a target="_blank" rel="noopener" href="http://www.isfdb.org/cgi-bin/pl.cgi?GRSBCKYR1999">Bleiler (Gernsback)</a>.
Notes
First published in Science and Invention May 1924.
Amazing Stories, May 1926, illustrated by Frank R. Paul.