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    The Dominion Astrophysical Observatory, Victoria, B.C
    The Dominion Astrophysical Observatory, Victoria, B.C
    The Dominion Astrophysical Observatory, Victoria, B.C
    Ebook65 pages34 minutes

    The Dominion Astrophysical Observatory, Victoria, B.C

    By J. S. Plaskett

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    "The Dominion Astrophysical Observatory, Victoria, B.C" by J. S. Plaskett. Published by Good Press. Good Press publishes a wide range of titles that encompasses every genre. From well-known classics & literary fiction and non-fiction to forgotten−or yet undiscovered gems−of world literature, we issue the books that need to be read. Each Good Press edition has been meticulously edited and formatted to boost readability for all e-readers and devices. Our goal is to produce eBooks that are user-friendly and accessible to everyone in a high-quality digital format.
    LanguageEnglish
    PublisherGood Press
    Release dateNov 5, 2021
    ISBN4066338080073
    The Dominion Astrophysical Observatory, Victoria, B.C

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      Book preview

      The Dominion Astrophysical Observatory, Victoria, B.C - J. S. Plaskett

      J. S. Plaskett

      The Dominion Astrophysical Observatory, Victoria, B.C

      Published by Good Press, 2022

      [email protected]

      EAN 4066338080073

      Table of Contents

      SECTION 1.—HISTORY AND CONSTRUCTION

      Introduction

      Historical Sketch

      Location

      Construction

      SECTION 2.—THE BUILDING AND DOME

      The Observatory Building

      The Dome

      Dome Accessories

      Mechanism for Silvering

      SECTION 3.—MECHANICAL PARTS OF TELESCOPE

      Introduction

      The Telescope Tube

      The Declination Axis

      The Polar Axis

      The Driving Clock

      Electric Motions

      Method of Operation

      Special Features of the Mounting

      SECTION 4.—OPTICAL PARTS AND SPECTROGRAPHS

      The Principal Mirror

      Mounting of Mirror

      The Principal Focus

      The Newtonian Arrangement

      The Cassegrain Arrangement

      Accessory Optical Parts

      The Spectrographs

      Method of Use

      SECTION 5.—THE WORK OF THE TELESCOPE

      Prevalent Misconceptions

      Spectroscopic Work

      Radial Velocities

      Spectroscopic Double Stars

      Absolute Magnitude and Distance

      Physical Conditions in the Stars

      Other Investigations

      Value of Astronomical Work

      Economic Value

      Ethical Value

      SECTION 1.—HISTORY AND CONSTRUCTION

      Table of Contents

      Introduction

      Table of Contents

      This description of the observatory, its equipment and work has been written by the director in response to a need, frequently expressed by the numerous visitors to the institution, of a non-technical account of the principles of the telescope and of the work of the institution. This account will commence by a short historical sketch of the beginnings of the undertaking followed by a description of the observatory and telescope and concluded by a resume of its work.

      Historical Sketch

      Table of Contents

      This observatory is a branch of the Department of the Interior of the Federal Government, the department which has charge of the administration of the western lands of the Dominion. In the colonization of these lands, one of the obvious first needs was a survey of the boundaries and subdivision into townships and sections. This need led to the organization of a surveys branch of the department and out of the necessity of accurate astronomical observations to delimit the boundaries and define the position of the base lines for subdivision work arose the astronomical branch. The first Chief Astronomer of Canada, the late Dr. W. F. King, was a man of sterling integrity and remarkable ability and to his genius must be ascribed in large degree the present development of astronomy in Canada. As Chief Astronomer and H. M. Commissioner of International Boundaries, he early realized the need of an observatory for an initial meridian, for housing and standardizing the instruments, and for some astronomical research. He was successful in having the fine Dominion Observatory erected on the Experimental Farm, Ottawa, in 1905 which housed the Astronomical Branch, the staff of the International Boundary Surveys and later the Geodetic Survey of Canada, of which he was the first superintendent.

      The Dominion Observatory was equipped with a 15-inch refractor provided with micrometer, photometer,

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