Two years earlier, in April, 1971, the first space station Salyut 1 carried into orbit Orion 1 Space Observatory, the first space telescope with an objective prism.
2.
The Venus image on the aperture plate will be sufficiently dispersed by the objective prism that the Ly ? image will be clearly separated from the longer wavelength continuum and emissions.
3.
In 1897 Frank McClean, a close friend of Gill's and the donor of the McClean telescope, discovered the presence of oxygen in a number of stars using an objective prism attached to the Astrographic Telescope.
4.
Receiving his astronomy Ph . D . in 1936 with a thesis titled " The Determination of Radial Velocities with the Objective Prism ", Dr . McCuskey accepted a job with the department of mathematics at his alma mater, the Case Institute of Technology.
5.
A 2 deg . magnesium fluoride ( MgF 2 ) objective prism mounted forward of the aperture plate is used to disperse the converging beam from the telescope : with the 1216 ?image focused onto the primary aperture, other wavelengths are excluded from the spectrograph producing a very low level of scattered light on the detector.
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