| 释义 |
siderostat Astr.|ˈsɪdərəʊstæt|
[f. sidero-2, after heliostat.]
An astronomical instrument by which a star under observation may be kept within the same part of the field of a telescope.
1877G. F. Chambers Astron. (ed. 3) Vocab. 916 A form of the instrument [heliostat] specially used for astronomical purposes is called a siderostat. 1878Lockyer Stargazing 343 One of the most recent additions to astronomical tools is the Siderostat. 1881Abney Photogr. 289 Before the introduction of Foucault's siderostat a telescope would have had to be mounted equatorially, and a clock motion would probably have been necessary.
Hence sideroˈstatic a.
1879Proc. Roy. Soc. Dublin II. 361 The Siderostatic Telescope..is principally intended for solar spectroscopic investigation. 1885A. M. Clerke Hist. Astron. 450 An instrument with ‘siderostatic’ mounting. |