A voyage in space; a course of six lectures "adapted to a juvenile auditory" delivered at the Royal Institution at Xmas 1913 (1915)
Turner, Herbert Hall, 1861-1930 · London Society for Promoting Christian Knowledge · leaf 143
ready described, the other fixed. If we had onlythe first mirror, then any part of the sky would indeedremain stationary, but the telescope must be pointed toit in a particular direction. The second mirror makes itunnecessary to point the telescope. 122 A VOYAGE IN SPACE is 230 feet. We have got… … The High Tower Telescope on Mount Wilson. once for all. That is of course not altogether aneasy matter, because a telescope must be fixed verysteadily; it will not do, for instance, for it to beshaken by the wind. How are we to prevent atower 150 feet high from being shaken by the wind ?Professor…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
