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 157
d he found that thebright one must be 240 times as bright as ourSun, and even the fainter one, which has hithertobeen called dark, is 16 times as bright as ourSun ! I think you will agree with me that this isa wonderful addition to our knowledge; we havebeen able to find out that a star which… … JOURNEYING BY TELESCOPE *37 even the dark side of the fainter body is 16 timesas bright as our Sun. And the chief part of thisknowledge comes, not from using a very largetelescope, but from putting a sensitive apparatusin place of the eye end. There is one more thing I must tell you in con-cluding…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
