Celestial Objects for Common Telescopes

Abstract

THIS is a new and much extended edition of a work which has attained considerable popularity amongst the many amateurs of astronomy in this country who are limited to the use of instruments of moderate optical capacity, or as the author terms them, “Common Telescopes.” By this term are intended achromatics with aperture of from three to five inches, or reflectors of somewhat greater diameter, yet as telescopes of higher pretensions are now in the possession of private observers, the author in the selection of additional objects has aimed at including such as may be considered tests for a superior class of instrument. The increase in telescopic range applying chiefly to the sidereal branch of astronomy, the additions have been taken for the most part from the works of the Struves and Burnhatn for double stars, and Sir John Herschel's catalogue for nebulæ: the total increase in the number of objects brought together in this new edition over the preceding one, is stated to be about 1500.

Celestial Objects for Common Telescopes.

By the Rev. T. W. Webb Fourth Edition, revised and greatly enlarged. (London: Longmans, Green, and Co., 1881.)